Pull disc auxiliary starter and device

Abstract

The invention relates to the field of auxiliary starters, in particular to a pull disc auxiliary starter which comprises 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 center shaft, the pull disc is located between the shell and the pawl assembly, the pull disc and the pawl assembly are of a separated type, and the return mechanism is arranged between the pull disc and the pawl assembly. 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 invention relates to the field of auxiliary starters, in particular to a pull plate auxiliary starter. Background Art

[0002] Auxiliary starters are commonly used in the field of agricultural machinery. They are mainly used to start agricultural equipment with diesel or gasoline engines. Auxiliary starters are divided into three types: hand-crank type, pull-disk type and electric starter.

[0003] In the prior art, for the pull-disk type auxiliary starter, such as Chinese invention patent CN113847180B and Chinese invention patent CN202832926U, its working method is to pull the starting rope to make the pull disk rotate around the central axis, and the pawl assembly set on the pull disk rotates together. During the rotation process, the coil spring is wound to store force, and at the same time, the pawl swings around the hinge point and opens outward and inserts into the hole corresponding to the starter cup on the diesel engine to start the engine; when the starting rope is released, the starting disk rotates in the opposite direction around the central axis under the elastic force released by the coil spring, so that the pull rope is recovered to the pull disk. The difference between the starting method of the pull-disk auxiliary starter and the hand-cranked auxiliary starter is that the hand-cranked auxiliary starter uses the coil spring to release elastic potential energy to drive the pawl assembly to rotate, and the pawl drives the starter cup, and the hand-cranking force requirement is not as high as the pull-disk type auxiliary starter. Therefore, when the pull-disk type auxiliary starter is started, the operator's force requirement is relatively high.

[0004] Since the existing pull-disk auxiliary starter may have starting failures when starting and cannot guarantee one-time starting, it is common for the operator to pull the pull disk hard to rotate it, causing the pawl to hit the starting cup, and the reaction force is fed back to the operator's hand, causing the operator's hand to be injured. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a pull-plate auxiliary starter to solve the problem in the prior art that the pull-plate auxiliary starter fails to start, resulting in reaction force feedback to the operator, causing injury to the operator's hand.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: 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 axis, and the pull-plate is located between the shell and the pawl assembly. It is 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 portion.

[0007] Furthermore, the friction part includes a first friction part arranged on the pull plate and a second friction part arranged on the pawl assembly, and the first friction part and the second friction part cooperate with each other through protrusions and protrusions or protrusions and grooves; the pull plate and the pawl assembly move relative to each other based on the axial direction of the central axis under the cooperation of the first friction part and the second friction part; an elastic part is also arranged on the central axis, and the elastic part is used to limit and return the relative displacement of the pull plate and the pawl assembly.

[0008] Furthermore, the elastic member is located between the pull plate and the housing, and the elastic member includes a fixed end and a sliding end, and the sliding end cooperates with the pull plate to make the pull plate slide in the axial direction of the central axis.

[0009] Furthermore, 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, and the sliding end cooperates with the pull plate to make the pull plate slide in the axial direction of the central shaft.

[0010] Furthermore, the sliding end of the elastic member cooperates with the pull plate through a protrusion and a groove.

[0011] Furthermore, the elastic member is located on the pawl assembly, and the elastic member includes a fixed end and a sliding end, and the sliding end cooperates with the pawl assembly to make the pawl assembly slide in the axial direction of the central shaft.

[0012] Furthermore, the fit is a clearance fit, and the clearance of the clearance fit is smaller than the maximum distance of relative displacement between the pull plate and the pawl assembly.

[0013] Furthermore, there are two elastic members, and the elastic members include a fixed end and a sliding end, wherein the sliding end of one elastic member cooperates with the pull plate to make the pull plate slide in the axial direction of the central shaft, and the sliding end of the other elastic member cooperates with the pawl assembly to make the pawl assembly slide in the axial direction of the central shaft.

[0014] Furthermore, the fit is a clearance fit, and the clearance of the clearance fit is smaller than half of the maximum relative displacement distance between the pull plate and the pawl assembly.

[0015] Furthermore, the slope of the friction surface between the first friction portion and the second friction portion when the pull plate returns to its original position is smaller than the slope of the friction surface when the pull plate is started.

[0016] A device comprises the pull plate auxiliary starter described in any one of the above items.

[0017] The technical effects of the present invention are: 1. By designing the pull plate and the pawl assembly separately, the pawl assembly or the pull plate can be easily replaced separately after being damaged, which saves costs compared to the integrated design in the prior art. Secondly, in the prior art, one end of the coil spring is fixed on the pull plate. Therefore, after the pawl assembly is damaged, it is only necessary to disassemble the corresponding parts of the pawl assembly to replace it. There is no need to disassemble the shell and the pull plate, nor to remove the coil spring, so maintenance is more convenient. In addition, if the integrated design in the prior art is used, the coil spring needs to be removed after the pawl assembly or the pull plate is damaged. After the coil spring is pulled out, it will instantly bounce open under the action of the elastic force, which may easily cause harm to the operator or the surrounding people. Therefore, the separate design can improve safety during the maintenance process.

[0018] 2. By setting 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. At the same time, when a starting failure occurs and the engine does not start normally, the reaction force of the pawl hitting the start cup is greater than the friction force of the friction part, and the pull plate and the pawl assembly will slip. Therefore, the reaction force of the pawl hitting the start cup will not be fully fed back to the operator's hand, preventing the operator's hand from being injured due to the reaction force.

[0019] 3. By arranging the protrusions and protrusions or the protrusions and grooves on the friction part of the pull plate and the pawl assembly, the friction area can be more effectively controlled compared to the friction mode of the friction surface, and the separation effect can be achieved. At the same time, by arranging an elastic member on the central axis, the pull plate or the pawl assembly can be returned to its original position. In addition, the elastic force of the elastic member can be used to effectively offset the friction force, reduce the friction force feedback to the pull plate starter body, reduce the load of the starter body due to the friction force, and improve the product performance and service life.

[0020] 4. By matching the clearance between the sliding end of the elastic part and the pull plate or ratchet assembly, it is prevented that the elastic force of the elastic part is too large, and the resistance of the pull plate return wheel when retracting the rope is too large, causing the pull plate to be unable to return to its position and the pull rope to be unable to be recovered normally.

[0021] 5. When the pull plate returns to its original position, by setting the slope of the friction surface of the first friction part and the second friction part when the pull plate returns to its original position to be smaller than the slope of the friction surface when starting, the friction resistance can be further reduced, so that the pull plate can return to its original position normally and the pull rope can be recovered normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0023] Figure 1 A top view of the pull plate auxiliary starter of the present invention; Figure 2 It is an exploded schematic diagram of the pull plate auxiliary starter of the present invention; Figure 3 It is an exploded schematic diagram of the pull plate and the pawl assembly of the present invention; Figure 4 It is a schematic diagram of an embodiment of the present invention; Figure 5 is a second schematic diagram of an embodiment of the present invention; Figure 6 is a third schematic diagram of an embodiment of the present invention; Figure 7 For the present invention Figure 6 A partial enlarged view of the M part; Figure 8 Schematic diagram of the slope of the friction surface of the friction part of the present invention.

[0024] The figure numbers are as follows: 100, shell; 200, pull plate; 300, elastic member; 400, central axis; 500, pawl assembly; 600, cover plate; 700, friction portion; 310, fixed end; 320, sliding end; 410, first boss; 420, second boss; 510, pawl; 520, pawl plate; 530, third boss; 710, first friction portion; 720, second friction portion. DETAILED DESCRIPTION The following embodiments of the present invention are provided as inspiration. Through the following description, relevant ordinary technicians can make various changes and modifications without departing from the technical concept of the present invention. The protection scope of the present invention is not limited to the contents of the claims and the specification.

[0026] The present invention will be further described with reference to the accompanying drawings: like Figure 1-2 As shown, a pull-plate auxiliary starter includes a housing 100, a pull-plate 200, a pawl assembly 500, a return mechanism, and a start mechanism; the pawl assembly 500 includes a pawl plate 520, a pawl 510, a cover plate 600, and a pawl shifting block arranged on the cover plate 600; the return mechanism is used to return the pull-plate 200 and retract the pull rope, and the return mechanism can be a coil spring. The start mechanism is used to rotate the pull-plate 200, and can be selected to rotate the pull-plate 200 manually by pulling the pull rope, or to drive the pull-plate 200 to rotate by the pull rope through an electric device. The pull-plate 200 and the pawl assembly 500 are both rotatably arranged in the housing 100 through a central axis 400, and the pull-plate 200 is located between the housing 100 and the pawl assembly 500. The pull-plate 200 and the pawl assembly 500 are separated, that is, they are independent designs that are not integrated, and the contact surface between the pull-plate 200 and the pawl assembly 500 is provided with a friction part 700.

[0027] The friction part 700 may be provided in the form of a friction surface, that is, a friction surface is provided on a side of the pull plate 200 that contacts the pawl assembly 500 , and / or a friction surface is provided on a side of the pawl assembly 500 that contacts the pull plate 200 .

[0028] The implementation principle is that the pull plate 200 is driven to rotate through the starting mechanism. At the same time, since the pull plate 200 is fixedly connected to one end of the coil spring, the coil spring is also driven to contract and store energy. The pull plate 200 generates friction during the rotation process through the friction part 700 between the pull plate 200 and the pawl assembly 500, and also drives the pawl assembly 500 to rotate. During the rotation process of the pawl assembly 500, the pawl 510 is hinged on the pawl plate 520, which drives the pawl 510 to rotate. Under the action of the pawl block on the cover plate 600, the pawl 510 pops out and inserts into the starter cup, and the engine is started through the starter cup. After the start is successful, the starting mechanism releases the pull rope, the coil spring releases the elastic potential energy, drives the pull plate 200 to reverse, and the pull rope is recovered to the pull plate 200.

[0029] If the start fails, the impact force between the pawl 510 and the start cup is greater than the friction force of the friction part 700, so that the pull plate 200 and the pawl assembly 500 slip, which can effectively reduce the impact force between the pawl 510 and the start cup and feedback to the operator or the electric start device, thereby preventing injury to the operator or damage to the electric start device. If a second start is required, just repeat the above steps.

[0030] This embodiment not only has the above-mentioned technical effects, but also has the function of separating the pull plate 200 and the pawl assembly 500, which can facilitate the separate replacement of the pawl assembly 500 or the pull plate 200 after it is damaged, thereby saving costs compared to the one-piece design in the prior art; secondly, in the prior art, one end of the coil spring is fixed to the pull plate 200, therefore, after the pawl assembly 500 is damaged, it is only necessary to disassemble the corresponding parts of the pawl assembly 500 for replacement, without the need to disassemble the shell 100 and the pull plate 200, or to remove the coil spring, so that maintenance is more convenient; in addition, according to the one-piece design in the prior art, after the pawl assembly 500 or the pull plate 200 is damaged, the coil spring needs to be removed, and after the coil spring is pulled out, it will instantly bounce open under the action of the elastic force, which may easily cause harm to the operator or the surrounding people. Therefore, the separate design can improve safety during the maintenance process.

[0031] Since the friction surface is used in the above-mentioned embodiment, all the loads caused by friction are fed back to the pull plate 200, the pawl assembly 500, the housing 100 and other components, which increases the loss of the pull plate 200 auxiliary starter and has a certain impact on the service life of the product.

[0032] Therefore, based on this problem, further implementation plans are proposed, such as Figure 2-Figure 7As shown, the friction portion 700 includes a first friction portion 710 arranged on the pull plate 200 and a second friction portion 720 arranged on the pawl assembly 500, and the first friction portion 710 and the second friction portion 720 cooperate with each other through protrusions and protrusions or protrusions and grooves; the pull plate 200 and the pawl assembly 500 move relative to each other based on the axial direction of the central axis 400 under the cooperation of the first friction portion 710 and the second friction portion 720; an elastic member 300 is also arranged on the central axis 400, and the elastic member 300 is used to limit and return the relative displacement of the pull plate 200 and the pawl assembly 500.

[0033] Specifically, a protrusion is provided on the first friction part 710, a protrusion is provided on the second friction part 720, or a protrusion is provided on the first friction part 710, a groove is provided on the second friction part 720, or a groove is provided on the first friction part 710, and a protrusion is provided on the second friction part 720, so that the pull plate 200 and the pawl assembly 500 are relatively displaced due to the change of the protrusion position during the rotation process, and the protrusions contact and squeeze each other; or the protrusions contact the surface after leaving the grooves and are squeezed by the protrusions, so that the pull plate 200 and the pawl assembly 500 are relatively displaced. With respect to the relative displacement, the pull plate 200 can be axially slidably connected on the central axis 400 and / or the pawl assembly 500 can be axially slidably connected on the central axis 400. Through this embodiment, it can be achieved that when the resistance generated by the collision process between the pawl 510 and the starter cup is greater than the friction force generated by the friction part 700, the cooperation between the protrusions will undergo a displacement change, and the squeezing of the protrusions will cause the pull plate 200 and / or the pawl assembly 500 to slide in the axial direction on the central axis 400, so that the friction surface between the pull plate 200 and the pawl assembly 500 can be reduced, the friction force can be reduced, and the pull plate 200 and the pawl assembly 500 can slip relative to each other, thereby preventing the operator's hand from being injured by the reaction force of the pawl 510 hitting the starter cup when the operator pulls the pull plate 200. If the starting mechanism is an electric start, the damage to the electric starting mechanism can also be reduced.

[0034] Of course, merely separating the pull plate 200 from the pawl assembly 500 can only reduce damage to the starting operator or the electric starting mechanism. Since a second start is required when the engine fails to start normally, the pull plate 200 and / or the pawl assembly 500 need to be returned to their original positions to achieve engagement between the pull plate 200 and the pawl assembly 500 and normal power transmission.

[0035] Therefore, based on this problem, an elastic member 300 is provided on the central shaft 400. The elastic member 300 is used to limit the relative displacement of the pull plate 200 and the pawl assembly 500 by elastic force, and can also return the pull plate 200 and the pawl assembly 500 by elastic force. Specifically, when the protrusions are squeezed by the protrusions or the protrusions are separated from the grooves, the protrusions are contacted and squeezed with the surface, so that the pull plate 200 and the pawl assembly 500 are relatively displaced, and the elastic member 300 provides resistance through elastic deformation to limit the distance of the relative displacement of the pull plate 200 and the pawl assembly 500. In addition, when the engine is successfully started or needs to be started again, after the pawl 510 is separated from the starting cup, the pull plate 200 and the pawl assembly 500 need to be returned to achieve engagement. Therefore, based on the elastic force of the elastic member 300, the pull plate 200 and / or the pawl assembly 500 are returned to achieve an engaged state.

[0036] Regarding the specific position relationship of the elastic member 300, there are several ways as follows: The elastic member 300 includes a fixed end 310 and a sliding end 320. Since the elastic member 300 is disposed on the central axis 400, the fixed end 310 is disposed on the central axis 400 to achieve a fixed arrangement of the fixed end 310 of the elastic member 300 relative to the central axis 400. Of course, the fixed end 310 of the elastic member 300 disposed on the central axis 400 can be absolutely fixed, that is, directly fixed on the central axis 400; or relatively fixed, that is, the fixed end 310 of the elastic member 300 is relatively fixed on the central axis 400 through the coordination of the position and mechanism relationship between the components.

[0037] The elastic member 300 is located between the pull plate 200 and the housing 100. Figure 4 As 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 axis 400. A specific cooperation method may be to set a gasket on the sliding end 320 of the elastic member 300 so that the gasket contacts the pull plate 200, and the pull plate 200 slides in the axial direction of the central axis 400 under the elastic force of the elastic member 300. Of course, other methods including a table top to make the sliding end 320 of the elastic member 300 contact the pull plate 200 should also be understood as the same or equivalent scheme of this embodiment.

[0038] The elastic member 300 is located between the pull plate 200 and the pawl assembly 500. Figure 5As shown, the sliding end 320 cooperates with the pull plate 200, so that the pull plate 200 slides in the axial direction of the central shaft 400. Specifically, the pawl assembly 500 is rotatably arranged on the central shaft 400, and the upper end is limited by the first boss 410 of the central shaft 400. The pull plate 200 is arranged at the lower end of the pawl assembly 500, and the pull plate 200 is rotatably arranged on the central shaft 400. The friction part 700 between the pull plate 200 and the pawl assembly 500 is provided with a displacement range. The elastic member 300 is arranged on the central shaft 400 and is located between the pawl assembly 500 and the pull plate 200. The fixed end 310 of the elastic member 300 rests on the pawl assembly 500, and the sliding end 320 of the elastic member 300 cooperates with the pull plate 200. The specific cooperation method can be a card slot cooperation, a hook cooperation, etc. As shown in the figure, the slot matching can be that a disk is set at the sliding end 320 of the elastic member 300, the side of the disk is grooved, and a protrusion is set on the pull plate 200, and the protrusion matches the groove. When the impact force of the pawl 510 and the start cup is greater than the friction force of the friction part 700, under the extrusion of the pull plate 200 and the friction part 700 of the pawl assembly 500, the pull plate 200 can be displaced downward to achieve 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 it can achieve the function of limiting. At the same time, when the start is successful or a second start is required, the elastic force of the elastic member 300 pulls the pull plate 200 back through the sliding end 320 to achieve the engagement of the pull plate 200 and the pawl assembly 500. For the fixed end 310, this embodiment is relatively fixed, that is, the fixed end 310 is pressed against the pawl assembly 500 by the elastic force of the elastic member 300. Of course, the fixed end 310 of the elastic member 300 may also be directly fixed on the central axis 400 to achieve fixation.

[0039] 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, specifically, the elastic member 300 is arranged on the central shaft 400, and the fixed end 310 is fixed on the central shaft 400 through the cover plate 600 to achieve fixation 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 through other components. The sliding end 320 cooperates with the pawl assembly 500, and specifically, a third boss 530 is arranged on the side of the pawl assembly 500 close to the central shaft 400, and the boss can be an annular boss. When the impact force between the pawl 510 and the starter cup is too large, the pull plate 200 is squeezed by the friction part 700 of the pawl assembly 500, and the pawl assembly 500 is displaced relative to the pull plate 200 in the axial direction of the central axis 400. At this time, the third boss 530 of the pawl assembly 500 applies pressure to the elastic member 300, causing the elastic member 300 to produce elastic deformation, and the pull plate 200 and the pawl assembly 500 slip, thereby protecting the operator's hand or the electric starter device. When the pawl assembly 500 needs to return to its original position, the elastic member 300 applies elastic force to the pawl assembly 500 to make the pawl assembly 500 engage with the pull plate 200.

[0040] like Figure 7 As shown, in order to improve the starting efficiency and prevent the friction part 700 from being easily separated, a first boss 420 is provided on the central axis 400. The first boss 420 is located on the other side of the sliding end 320 of the elastic member 300 relative 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 to make the elastic member 300 in a compressed state. When the friction force of the friction part 700 is squeezing, the pull plate 200 and the pawl assembly 500 move relative to each other, and the third boss 530 of the pawl assembly 500 squeezes the sliding end 320 of the elastic member 300, and is therefore subjected to the elastic force of the elastic member 300. Since the elastic member 300 is originally in 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 meshing state, trying to continue to start the engine. When the pawl 510 hits the starter cup, the impact force is too large, and the third boss 530 of the pawl assembly 500 continues to compress the elastic member 300, causing the pull plate 200 and the pawl assembly 500 to slip, thereby protecting the operator or the electric starter mechanism.

[0041] The above-mentioned sliding end 320 of the elastic member 300 and the pull plate 200 or the pawl assembly 500 are clearance fit, that is, when the pawl assembly 500 or the pull plate 200 does not compress or stretch the elastic member 300, the sliding end 320 of the elastic member 300 does not directly contact the pull plate 200 or the pawl assembly 500, and there is a certain gap between the sliding end 320 and the pull plate 200 or the pawl assembly 500, and the gap of the clearance fit is smaller than the maximum distance of relative displacement between the pull plate 200 and the pawl assembly 500. This solves the problem that when there is no gap, the pressure generated by the friction part 700 of the pull plate 200 and the pawl assembly 500 causes the elastic member 300 to give a reaction force, resulting in excessive pressure on the pull plate 200 from the elastic member 300, the pull plate 200 cannot return to its original position normally, and the pull rope cannot be recovered normally. Of course, the size of the gap cannot exceed the relative displacement distance between the pull plate 200 and the pawl assembly 500. When the gap is larger than the relative displacement distance between the pull plate 200 and the pawl assembly 500, during the squeezing process between the first friction portion 710 and the second friction portion 720, the displacement generated cannot cause the elastic member 300 to generate a reaction force, resulting in the pull plate 200 being unable to achieve secondary engagement for return.

[0042] In addition, there may be two elastic members 300, wherein the sliding end 320 of one elastic member 300 cooperates with the pull plate 200 to make the pull plate 200 slide in the axial direction of the central axis 400, and the sliding end 320 of the other elastic member 300 cooperates with the pawl assembly 500 to make the pawl assembly 500 slide in the axial direction of the central axis 400. That is, the aforementioned scheme of the elastic member 300 being located between the pull plate 200 and the pawl assembly 500 or the elastic member 300 being located between the pull plate 200 and the pawl assembly 500 is combined with the scheme of the elastic member 300 being located at the other end of the pawl assembly 500 relative to the pull plate 200. It should be noted that in the clearance fit of this scheme, the clearance of the clearance fit is less than half of the maximum relative displacement distance of the pull plate 200 and the pawl assembly 500. That is, both the pull plate 200 and the pawl assembly 500 will slide, so the control of the clearance needs to be reduced to half of the displacement interval of the pull plate 200 and the pawl assembly 500.

[0043] In order to further reduce the friction of the friction part 700 during the return of the pull plate 200, so that the pull plate 200 is easier to return and the pull rope is easier to retract, the slope of the friction surface of the first friction part 710 and the second friction part 720 when the pull plate 200 returns can be set to be smaller than the slope of the friction surface when starting.

[0044] Specific as Figure 8 As shown, taking A and B as the contact surfaces when returning to the original position and C and D as the contact surfaces when starting as an example, the slope a of the contact surfaces of A and B is smaller than the slope b of the contact surfaces of C and D. That is, when a is smaller than b, the friction force of the friction part 700 is relatively small, which can be more conducive to the return of the pull plate 200.

[0045] A device comprises the pull plate auxiliary starter described in any one of the above items.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pull-plate auxiliary starter, comprising a housing (100), a pull-plate (200), a pawl assembly (500), a return mechanism, and a start mechanism, wherein the pull-plate (200) and the pawl assembly (500) are both rotatably arranged in the housing (100) via a central axis (400), and the pull-plate (200) is located between the housing (100) and the pawl assembly (500), characterized in that: The pull plate (200) and the ratchet assembly (500) are of a separate type, and a friction portion (700) is provided on the contact surface between the pull plate (200) and the ratchet assembly (500).

2. A pull plate auxiliary starter as claimed in claim 1, characterized in that: The friction part (700) comprises a first friction part (710) arranged on the pull plate (200) and a second friction part (720) arranged on the pawl assembly (500), wherein the first friction part (710) and the second friction part (720) cooperate with each other through protrusions or protrusions and grooves; the pull plate (200) and the pawl assembly (500) move relative to each other based on the axial direction of the central axis (400) under the cooperation of the first friction part (710) and the second friction part (720); an elastic part (300) is also arranged on the central axis (400), and the elastic part (300) is used to limit and / or return the relative displacement between the pull plate (200) and the pawl assembly (500).

3. A pull plate auxiliary starter as claimed in claim 2, characterized in that: The elastic member (300) is located between the pull plate (200) and the housing (100), and the elastic member (300) comprises a fixed end (310) and a sliding end (320), and the sliding end (320) cooperates with the pull plate (200) to enable the pull plate (200) to slide in the axial direction of the central axis (400).

4. A pull plate auxiliary starter as claimed in claim 2, characterized in that: The elastic member (300) is located between the pull plate (200) and the ratchet assembly (500), and the elastic member (300) comprises a fixed end (310) and a sliding end (320), and the sliding end (320) cooperates with the pull plate (200) to enable the pull plate (200) to slide in the axial direction of the central axis (400).

5. A pull plate auxiliary starter as claimed in claim 4, characterized in that: The sliding end (320) of the elastic member (300) cooperates with the pull plate (200) via a protrusion and a groove.

6. A pull plate auxiliary starter as claimed in claim 2, characterized in that: 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), and the sliding end (320) cooperates with the pawl assembly (500) to enable the pawl assembly (500) to slide in the axial direction of the central axis (400).

7. A pull plate auxiliary starter according to any one of claims 3 to 6, characterized in that: The fit is a clearance fit, and the clearance of the clearance fit is smaller than the maximum distance of relative displacement between the pull plate (200) and the ratchet assembly (500).

8. A pull plate auxiliary starter as claimed in claim 2, characterized in that: There are two elastic members (300), and the elastic members (300) include a fixed end (310) and a sliding end (320), wherein the sliding end (320) of one elastic member (300) cooperates with the pull plate (200) to enable the pull plate (200) to slide in the axial direction of the central axis (400), and the sliding end (320) of the other elastic member (300) cooperates with the pawl assembly (500) to enable the pawl assembly (500) to slide in the axial direction of the central axis (400), and the cooperation is a clearance cooperation, and the clearance of the clearance cooperation is less than half of the maximum relative displacement distance between the pull plate (200) and the pawl assembly (500).

9. A pull plate auxiliary starter as claimed in claim 2, characterized in that: The slope of the friction surface of the first friction part (710) and the second friction part (720) when the pull plate (200) returns to its original position is smaller than the slope of the friction surface when it is started.

10. An agricultural machine, comprising the pull plate auxiliary starter according to any one of claims 1 to 9.

Images