WO2021032044A1 - Torque transfer mechanism, electric starting device, engine and garden tool - Google Patents

Torque transfer mechanism, electric starting device, engine and garden tool Download PDF

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Publication number
WO2021032044A1
WO2021032044A1 PCT/CN2020/109473 CN2020109473W WO2021032044A1 WO 2021032044 A1 WO2021032044 A1 WO 2021032044A1 CN 2020109473 W CN2020109473 W CN 2020109473W WO 2021032044 A1 WO2021032044 A1 WO 2021032044A1
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WO
WIPO (PCT)
Prior art keywords
transmission member
elastic buffer
peripheral surface
buffer member
transmission
Prior art date
Application number
PCT/CN2020/109473
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French (fr)
Chinese (zh)
Inventor
郭宁
吴文波
Original Assignee
苏州科瓴精密机械科技有限公司
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Publication of WO2021032044A1 publication Critical patent/WO2021032044A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/14—Construction providing resilience or vibration-damping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/12—Toothed members; Worms with body or rim assembled out of detachable parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels

Definitions

  • the invention relates to the technical field of garden tools, in particular to a torque transmission mechanism, an electric starting device, an engine and a garden tool.
  • a small gasoline engine is usually equipped with an electric starter.
  • the electric starter usually includes a starter motor, a power transmission mechanism, and a clutch mechanism.
  • the power transmission mechanism includes a reduction gear box and an energy storage component. The output torque is transmitted to the energy storage component through the gearbox, and the energy storage component converts mechanical energy into potential energy. When the stored potential energy reaches the threshold, it is released to the clutch mechanism and rotates instantly.
  • the clutch mechanism engages with the crankshaft and drives the crankshaft to rotate to start gasoline engine. When the gasoline engine is started, the transmission between the clutch mechanism and the crankshaft is disconnected.
  • the reduction box is usually constructed as a gear set, which includes a gear 10' with a cavity capable of accommodating an energy storage component; the energy storage component is usually configured as a vortex spring 20' accommodated in the cavity of the gear 10' Inside the body, one end is connected with the gear 10', and the other end is connected with the ratchet 30' of the clutch mechanism.
  • the volute spring 20' is wound by a slender spring material. It has an outer free end far away from the spiral center and an inner free end close to the spiral center.
  • the inner free end is configured as a first hook 21', and the outer free end is configured It is the second hook 22', the inner circular surface of the ratchet 30' is provided with a first groove portion 31' for fixing the first hook 21', and the inner circular surface of the gear 10' is provided with a fixed second hook 22' The second groove 11'.
  • the disadvantage of the prior art is that a volute spring 20’ is used to buffer and transmit torque between the gear 10’ and the ratchet 30’.
  • the vortex spring 20’ has a complicated manufacturing process, high cost, large transmission vibration, and noise, and the gear 10’
  • the hooks connected to the volute spring 20' and between the volute spring 20' and the ratchet wheel 30' are easily broken.
  • safety protection is required during the assembly process, and auxiliary tooling is required during disassembly and assembly, which wastes manpower and is inefficient.
  • the purpose of the present invention is to provide a torque transmission mechanism, an electric starting device, an engine and a garden tool to solve the complicated manufacturing process and high cost caused by the use of vortex springs to transmit torque between the gear and the ratchet in the existing torque transmission mechanism.
  • the transmission vibration is large, the hook is easy to break, and the disassembly and assembly are laborious.
  • the present invention adopts the following technical solutions:
  • a torque transmission mechanism includes a first transmission member, a second transmission member, and an elastic buffer member located between the first transmission member and the second transmission member.
  • the elastic buffer member is configured to buffer and transmit the first transmission member.
  • the torque of a transmission member is the second transmission member.
  • the elastic buffer member is ring-shaped, the outer peripheral surface of the elastic buffer member forms an elastic pressing surface contact with the first transmission member, and the inner peripheral surface of the elastic buffer member is in contact with the first transmission member.
  • the second transmission member forms an elastic pressing surface contact.
  • a first transmission member cylinder is provided on the inner end surface of the first transmission member
  • a second transmission member ring is provided on the outer end surface of the second transmission member
  • the second transmission member The transmission member ring is sleeved on the first transmission member cylinder
  • the elastic buffer member is elastically extruded between the inner circular surface of the first transmission member and the outer circular surface of the second transmission member .
  • the geometric center and the rotation center of the first transmission member cylinder are both located on the axis X; the geometric center of the elastic buffer member is located on the axis Y, and the rotation center of the elastic buffer member is located On the axis X; the geometric center of the second transmission member ring is located on the axis Y, and the rotation center of the second transmission member ring is located on the axis X, where the axis X and the The axes Y are parallel to each other and arranged at intervals.
  • the eccentricity of the point on the axis Y with respect to the point on the axis X is 0.2-0.3.
  • the eccentricity of the point on the axis Y with respect to the point on the axis X is 0.28.
  • the ratio of the inner radius of the elastic buffer to the outer radius of the elastic buffer is 0.4-0.5.
  • the ratio of the inner radius of the elastic buffer to the outer radius of the elastic buffer is 0.46.
  • a plurality of grooves are arranged on the inner circular surface of the first transmission member at intervals along the circumferential direction of the inner circular surface of the first transmission member.
  • the end surface of the elastic buffer member is provided with a chamfer.
  • the outer peripheral surface of the elastic buffer member is clamped with the inner peripheral surface of the first transmission member, and the inner peripheral surface of the elastic buffer member is connected with the outer periphery of the second transmission member. Face-to-face snap connection.
  • the outer peripheral surface of the elastic buffer member is provided with a first clamping groove
  • the inner peripheral surface of the first transmission member is provided with a first clamping block
  • the first clamping block is clamped to The first card slot.
  • the first slot has a fan-shaped structure, and the width of the first slot gradually increases along the direction that the inner circumferential surface of the elastic buffer member points to the outer circumferential surface.
  • the inner peripheral surface of the elastic buffer member is provided with a second clamping groove
  • the outer peripheral surface of the second transmission member is provided with a second clamping block
  • the second clamping block is clamped to The second card slot.
  • the second slot has a fan-shaped structure, and the width of the second slot gradually increases along the direction in which the inner circumferential surface of the elastic buffer member points to the outer circumferential surface.
  • At least two of the first clamping slots are provided, and at least two of the first clamping slots are circumferentially evenly distributed on the outer peripheral surface of the elastic buffer member;
  • At least two second clamping grooves there are at least two second clamping grooves, and at least two second clamping grooves are evenly distributed on the inner circumferential surface of the elastic buffer member in a circumferential direction.
  • the material of the elastic buffer member is polyurethane elastomer.
  • An electric starting device includes the torque transmission mechanism described in any of the above solutions.
  • An electric starting engine includes the above electric starting device.
  • a garden tool includes the above-mentioned electric start engine.
  • the torque transmission mechanism provided by the present invention includes a first transmission member, a second transmission member, and an elastic buffer member located between the first transmission member and the second transmission member.
  • the elastic buffer member is used to transmit torque, so that the first transmission member During the torque transmission process, the elastic buffer member is temporarily buffered, and then the elastic buffer member transmits the torque to the second transmission member, which solves the problem of the hooks connecting the gear and the volute spring and between the volute spring and the ratchet in the prior art. It is easy to break, and the elastic buffer member has a simple manufacturing process, low cost, low transmission noise, and easy disassembly and assembly, without the need to install additional safety protection components.
  • Fig. 1 is a first structural diagram of a torque transmission mechanism in the prior art
  • Figure 2 is a second structural diagram of a torque transmission mechanism in the prior art
  • Figure 3 is an exploded view of the torque transmission mechanism according to the first embodiment of the present invention.
  • FIG. 4 is a front view of the torque transmission mechanism according to the first embodiment of the present invention.
  • Figure 5 is a cross-sectional view in the direction of A-A in Figure 4.
  • Figure 6 is an exploded view of the torque transmission mechanism according to the second embodiment of the present invention.
  • Figure 7 is a front view of the torque transmission mechanism according to the second embodiment of the present invention.
  • Figure 8 is a cross-sectional view in the direction of B-B in Figure 4.
  • FIG. 9 is a cross-sectional view of the assembly structure of the torque transmission mechanism according to the second embodiment of the present invention.
  • the first card block 101.
  • the first card block; 102. The first gap; 201.
  • the second card block; 302. The second gap.
  • connection should be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components.
  • connection may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components.
  • the "above” or “below” of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them.
  • “above”, “above” and “above” the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature.
  • the “below”, “below” and “below” the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the first feature has a lower level than the second feature.
  • the terms “upper”, “lower”, “left”, “right”, and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for ease of description and simplified operations , Rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
  • the terms “first” and “second” are only used to distinguish them in description and have no special meaning.
  • This embodiment provides a torque transmission mechanism, as shown in FIGS. 3-5, including a first transmission member 10, a second transmission member 30, and an elastic buffer member 20 located between the first transmission member 10 and the second transmission member 30 , And the elastic buffer member 20 respectively forms elastic pressing surface contact with the first transmission member 10 and the second transmission member 30 and generates static friction force, and the torque of the first transmission member 10 is transmitted to the second transmission member 30 through the static friction force.
  • the first transmission member 10 is a gear
  • the second transmission member 30 is a ratchet.
  • the transmission contact surfaces of the elastic buffer member 20 and the first transmission member 10 and the second transmission member 30 are enlarged, which solves the problem of the gap between the gear 10 and the vortex spring in the prior art.
  • the hook claw connected between the spring and the ratchet wheel 30 is easy to break, and the elastic buffer member 20 has a simple manufacturing process, low cost, low transmission noise, easy disassembly and assembly, and no need to install additional safety protection components.
  • the elastic buffer member 20 is annular, the outer peripheral surface of the elastic buffer member 20 forms an elastic pressing surface contact with the first transmission member 10, and the inner peripheral surface of the elastic buffer member 20 and the second transmission member 30 form elasticity. Squeeze surface contact.
  • the inner end surface of the first transmission member 10 is provided with a first transmission member cylinder 11
  • the outer end surface of the second transmission member 30 is provided with a second transmission member ring 31
  • the second transmission member ring 31 is sleeved on
  • the elastic buffer member 20 is elastically extruded between the inner circular surface of the first transmission member 10 and the outer circular surface of the second transmission member ring 31, using the inner circular surface of the first transmission member 10 and
  • the static friction force between the outer circular surface of the elastic buffer member 20 and the inner circular surface of the elastic buffer member 20 and the outer circular surface of the second transmission member ring 31 can transmit the torque of the first transmission member 10 to the second transmission member 30.
  • the two end surfaces of the elastic buffer member 20 may be in
  • the first transmission member 10, the elastic buffer member 20 and the second transmission member 30 are fastened and connected by a fastening component.
  • the fastening component includes a fixed post 41 and a bolt 43.
  • the first transmission component cylinder 11 is provided with a hollow cavity, and the fixed post 41 is provided In the hollow cavity of the first transmission member cylinder 11, a threaded hole is opened on the fixing column 41, and a through hole is opened on the end surface of the second transmission member 30 where the second transmission member ring 31 is provided.
  • the threaded hole is threaded to connect the first transmission member 10 and the second transmission member 30 tightly, and the end surface of the second transmission member 30 is pressed against the elastic buffer member 20 to fix the elastic buffer member 20.
  • the fastening assembly further includes a gasket 42 which is provided between the bolt head of the bolt 43 and the inner end surface of the second transmission member 30.
  • the material of the elastic buffer member 20 is polyurethane elastomer.
  • the polyurethane elastomer material has 50% compression and strong recovery elasticity.
  • the polyurethane elastomer material itself has pressure resistance, wear resistance, impact resistance, oil resistance, acid and alkali resistance, and The characteristics of tearing can meet the basic requirements of electric starting devices, and its hardness can be selected from 25-98 degrees Shore. It can be selected according to the extension test of the use space, load, etc., and the most suitable application can be synthesized. Effect.
  • the material of the elastic buffer member 20 can be Uniglue, which is also called polyurethane PU elastomer, which is a new type of material with good strength, small compression deformation, and between plastic and rubber. It has the rigidity of plastic and the elasticity of rubber.
  • the material of the elastic buffer member 20 is not limited to polyurethane elastomer, and may also be a common elastomer material, such as a rubber material.
  • the end surface of the elastic buffer member 20 is provided with a chamfer to facilitate the assembly of the elastic buffer member 20.
  • the inner circular surface of the first transmission member 10 is provided with a plurality of grooves 12 at intervals along its circumferential direction.
  • the arrangement of the grooves 12 can increase the inner circular surface of the first transmission member 10 and the outer surface of the elastic buffer member 20. The friction force between the circular surfaces further increases the torque transmission between the first transmission member 10 and the second transmission member 30.
  • the geometric center and the center of rotation of the first transmission member cylinder 11 are located on the axis X; the geometric center of the elastic buffer member 20 is located on the axis Y, and the rotation center of the elastic buffer member 20 is located on the axis X
  • the geometric center of the second transmission member ring 31 is located on the axis Y, and the rotation center of the second transmission member ring 31 is located on the axis X, wherein the axis X and the axis Y are parallel to each other and arranged at intervals.
  • the inner circular surface of the first transmission member 10 is eccentrically arranged with respect to the outer circular surface, that is, the wall thickness of the first transmission member 10 gradually increases from one point in the circumferential direction to the opposite point, and the first transmission member cylinder 11 and The outer circular surface of the first transmission member 10 is concentric; the inner circular surface and the outer circular surface of the elastic buffer member 20 are arranged concentrically, that is, the elastic buffer member 20 is arranged with equal wall thickness along the circumferential direction; the inner circle of the second transmission member ring 31
  • the surface is eccentrically arranged with respect to the outer circular surface, that is, the wall thickness of the second transmission member ring 31 along the circumferential direction gradually increases to the opposite point, and the wall thickness of the second transmission member ring 31 is the thickest point of the first transmission member
  • the thinnest point of the wall thickness of 10 is directly opposite, and the thinnest point of the wall thickness of the second transmission member ring 31 is directly opposite to the thickest point of the first transmission member 10.
  • the outer circular surface of the elastic buffer member 20 is eccentrically arranged with respect to the inner circular surface, the inner circular surface and the outer circular surface of the first transmission member 10 are arranged concentrically, and the outer circular surface of the second transmission member ring 31 is opposite to each other.
  • the inner circular surface of the elastic buffer member 20 is eccentrically arranged with respect to the outer circular surface, the inner circular surface of the first transmission member 10 is eccentrically arranged with respect to the outer circular surface, and the second transmission member ring 31 The inner circular surface and the outer circular surface are arranged concentrically.
  • L1 is the rotation center of the elastic buffer 20 to elastic
  • L2 is the minimum distance from the rotation center of the elastic buffer member 20 to the outer circle of the elastic buffer member 20
  • r is the inner circle radius of the elastic buffer member 20.
  • the eccentricity is positively correlated with the friction generated by the movement.
  • the effect of the eccentricity on the performance of the elastic buffer member 20 mainly depends on the friction to be transmitted, and the friction to be transmitted depends on the size of the external load. As long as the friction is ensured
  • the force can be stably greater than the load to meet the design requirements.
  • the eccentricity e and the radius ratio k jointly determine the structural performance of the elastic buffer member 20.
  • the starting success rate of the electric starting device is relatively high.
  • the test results are as follows: the actual starting experiment is carried out 1220 times, one start is successful 1201 times, there are 19 failures, and the second start after the failure is all Success means that the first start success rate is >98%, and the second start success rate is 100%.
  • This embodiment also provides an electric starting device including the torque transmission mechanism described above.
  • This embodiment also provides an electric starter engine including the electric starter described above.
  • This embodiment also provides a garden tool including the above-mentioned electric start engine.
  • the garden tools can be lawn mowers, lawn mowers, brush cutters, tillers, pruners, chainsaws, high branch shears, suction blowers, and the like.
  • the torque transmission mechanism includes a first transmission member 10, a second transmission member 30, and a second transmission member 30 between the first transmission member 10 and the second transmission member 30.
  • the elastic buffer member 20 wherein the inner circumferential surface of the first transmission member 10 and the outer circumferential surface of the elastic buffer member 20, and the outer circumferential surface of the second transmission member 30 and the inner circumferential surface of the elastic buffer member 20 are clamped
  • the first transmission member 10 transmits torque
  • the first transmission member 10 first transmits the torque to the elastic buffer member 20, and the elastic buffer member 20 performs short-term buffering, and then the elastic buffer member 20 transfers the torque
  • the transmission to the second transmission member 20 can effectively solve the problem of easy breakage of the hooks between the gear 10 and the volute spring and between the volute spring and the ratchet 30 in the prior art, and the above-mentioned elastic buffer member 20 has simple manufacturing process and cost. Low, low transmission noise, easy to disassemble and assemble, no need to install additional safety protection
  • the above-mentioned elastic buffer member 20 has a ring structure, and in this embodiment, a first slot 201 is provided on the outer peripheral surface of the elastic buffer member 20.
  • a first clamping block 101 is provided on the inner circumferential surface of the transmission member 10, and the first clamping block 101 can be clamped to the first clamping slot 201 to realize the clamping connection between the first transmission member 10 and the elastic buffer member 20, so that The torque of the first transmission member 10 is transmitted to the elastic buffer member 20.
  • the inner peripheral surface of the first transmission member 10 is provided with the same number of first clamping blocks 101 as the first clamping slots 201.
  • the first slot 201 has a fan-shaped structure, and the width of the first slot 201 gradually increases along the direction from the inner circumferential surface of the elastic buffer member 20 to the outer circumferential surface.
  • the shape of the first locking block 101 matches the first locking slot 201.
  • the arrangement of this structure can make the contact area between the first locking block 101 and the first locking slot 201 larger, thereby making the torque transmission more stable, and making the elastic buffer member 20 have a better short-term buffering effect.
  • a first gap 102 is formed between the first card block 101 and the first card slot 201 that are clamped to each other.
  • the first gap 102 may be formed in the first card slot. Between the end of the block 101 and the bottom of the first card slot 201, it can also be formed between the side wall of the first card block 101 and the side wall of the first card slot 201, or between the side wall of the first card block 101. Between the end and the bottom of the first card slot 201 and between the side wall of the first card block 101 and the side wall of the first card slot 201. It may also be formed between the outer circumferential surface of the elastic buffer member 20 and the inner circumferential surface of the first transmission member 10.
  • a second locking groove 202 is provided on the inner peripheral surface of the elastic buffer member 20, and correspondingly a second locking block 301 is provided on the inner peripheral surface of the second transmission member 30, and the second locking block 301 is locked It is connected to the second slot 202 to realize the snap connection between the elastic buffer member 20 and the second transmission member 30.
  • at least two second card slots 202 can be provided (three in FIG. 6), and the two second card slots 202 are evenly distributed in the circumferential direction on the inner peripheral surface of the elastic buffer member 20, correspondingly ,
  • the outer peripheral surface of the second transmission member 20 is provided with the same number of second clamping blocks 301 as the second clamping slots 202.
  • the torque can be transmitted to the second transmission member 30 to achieve The torque transmission between the first transmission member 10 and the second transmission member 20 is achieved.
  • the second slot 202 also has a fan-shaped structure, and the width of the second slot 202 gradually increases along the direction that the inner peripheral surface of the elastic buffer member 20 points to the outer peripheral surface. In this way, the contact area between the second clamping block 301 and the second clamping slot 202 is larger, and the torque transmission effect is increased. Moreover, the structure of the second slot 202 can also make the engagement between the elastic buffer member 20 and the second transmission member 30 more stable. As shown in FIG. 9, in this embodiment, a second gap 302 is formed between the second clamping block 301 and the second clamping slot 202 that are clamped to each other. The second gap 302 may be formed at the end of the second clamping block 301.
  • the second card slot 202 Between the bottom portion and the bottom of the second card slot 202, it can also be formed between the side wall of the second card block 301 and the side wall of the second card slot 202, and can also be formed between the end of the second card block 301 and the second card slot 202. Between the bottoms of the two card slots 202 and between the side walls of the second card block 301 and the side walls of the second card slot 202. It may also be formed between the inner peripheral surface of the elastic buffer member 20 and the outer peripheral surface of the second transmission member 30. The second gap 302 can provide space for the elastic expansion and contraction of the elastic buffer member 20 and further improve the elastic buffer effect of the elastic buffer member 20.
  • the material of the above-mentioned elastic buffering member 20 is polyurethane elastomer, preferably it can be Uniglue, which is also called polyurethane PU elastomer, which has good strength, small compression deformation, and is between plastic and A new type of material between rubber, which has the rigidity of plastic and the elasticity of rubber.
  • This embodiment also provides an electric starting device including the torque transmission mechanism described above.
  • This embodiment also provides an electric starter engine including the electric starter described above.
  • This embodiment also provides a garden tool including the above-mentioned electric start engine.
  • the garden tool may be a lawn mower, a lawn mower, a brush cutter, a tiller, a pruner, a chain saw, a high branch shear, a blower and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

A torque transfer mechanism, an electric starting device, an engine and a garden tool. The torque transfer mechanism comprises a first transmission member (10), a second transmission member (30), and an elastic buffer member (20) located between the first transmission member (10) and the second transmission member (30). The elastic buffer member (20) is configured to buffer and transfer the torque of the first transmission member (10) to the second transmission member (30). The torque is transferred by using the elastic buffer member (20), so that the torque of the first transmission member (10) is temporarily buffered by the elastic buffer member (20) in the process of the torque transfer, and then the torque is transferred to the second transmission member (30) by means of the elastic buffer member (20), solving the problem in the prior art that hooks connected between a gear and a spiral spring and between the spiral spring and a ratchet wheel are easy to break. Furthermore, the elastic buffer member has a simple manufacturing process, a low cost, low transfer noise, and is easy to assemble and disassemble, without the need for additionally installing a security protection component.

Description

一种扭矩传递机构、电起动装置、引擎和园林工具Torque transmission mechanism, electric starting device, engine and garden tool 技术领域Technical field
本发明涉及园林工具技术领域，尤其涉及一种扭矩传递机构、电起动装置、引擎和园林工具。The invention relates to the technical field of garden tools, in particular to a torque transmission mechanism, an electric starting device, an engine and a garden tool.
背景技术Background technique
在现有技术中，小型汽油机通常配有电起动装置，电起动装置通常包括起动电机、动力传递机构和离合机构，动力传递机构包括减速箱和储能组件，在小型汽油机的起动阶段，起动电机输出的扭矩经减速箱传递给储能组件，储能组件将机械能转化为势能，当存储的势能达到阈值，则瞬间向离合机构释放并使其旋转，离合机构与曲轴啮合并驱动曲轴转动以起动汽油机。当汽油机起动后，离合机构与曲轴之间的传动断开。参见图1和图2，减速箱通常构造为齿轮组，其包括一个具有能够收容储能组件的腔体的齿轮10’；储能组件通常构造为涡簧20’收容于该齿轮10’的腔体内，其一端与该齿轮10’连接，另一端与离合机构的棘轮30’连接。涡簧20’是由细长的弹簧材料绕制而成，其具有远离螺旋中心的外自由端和靠近螺旋中心的内自由端，内自由端构造为第一勾爪21’，外自由端构造为第二勾爪22’，棘轮30’的内圆面上设置有固定第一勾爪21’的第一槽部31’，齿轮10’的内圆面上设置有固定第二勾爪22’的第二槽部11’。In the prior art, a small gasoline engine is usually equipped with an electric starter. The electric starter usually includes a starter motor, a power transmission mechanism, and a clutch mechanism. The power transmission mechanism includes a reduction gear box and an energy storage component. The output torque is transmitted to the energy storage component through the gearbox, and the energy storage component converts mechanical energy into potential energy. When the stored potential energy reaches the threshold, it is released to the clutch mechanism and rotates instantly. The clutch mechanism engages with the crankshaft and drives the crankshaft to rotate to start gasoline engine. When the gasoline engine is started, the transmission between the clutch mechanism and the crankshaft is disconnected. 1 and 2, the reduction box is usually constructed as a gear set, which includes a gear 10' with a cavity capable of accommodating an energy storage component; the energy storage component is usually configured as a vortex spring 20' accommodated in the cavity of the gear 10' Inside the body, one end is connected with the gear 10', and the other end is connected with the ratchet 30' of the clutch mechanism. The volute spring 20' is wound by a slender spring material. It has an outer free end far away from the spiral center and an inner free end close to the spiral center. The inner free end is configured as a first hook 21', and the outer free end is configured It is the second hook 22', the inner circular surface of the ratchet 30' is provided with a first groove portion 31' for fixing the first hook 21', and the inner circular surface of the gear 10' is provided with a fixed second hook 22' The second groove 11'.
现有技术的不足之处在于，齿轮10’与棘轮30’之间用涡簧20’缓冲及传递扭矩，涡簧20’制造工艺复杂、成本高、传递震动大、有噪音，且齿轮10’与蜗簧20’之间、蜗簧20’与棘轮30’之间连接的勾爪易断裂。同时，为避免蜗簧20’弹出伤人，装配过程中需要有安全防护，拆装时还需要辅助工装，浪 费人力，且效率低下。The disadvantage of the prior art is that a volute spring 20’ is used to buffer and transmit torque between the gear 10’ and the ratchet 30’. The vortex spring 20’ has a complicated manufacturing process, high cost, large transmission vibration, and noise, and the gear 10’ The hooks connected to the volute spring 20' and between the volute spring 20' and the ratchet wheel 30' are easily broken. At the same time, in order to prevent the volute spring 20' from popping up and hurting people, safety protection is required during the assembly process, and auxiliary tooling is required during disassembly and assembly, which wastes manpower and is inefficient.
发明内容Summary of the invention
本发明的目的在于提供一种扭矩传递机构、电起动装置、引擎和园林工具，以解决现有扭矩传递机构中齿轮与棘轮之间因采用涡簧传递扭矩所带来的制造工艺复杂、成本高、传递振动大、勾爪易断裂、以及拆装费力等问题。The purpose of the present invention is to provide a torque transmission mechanism, an electric starting device, an engine and a garden tool to solve the complicated manufacturing process and high cost caused by the use of vortex springs to transmit torque between the gear and the ratchet in the existing torque transmission mechanism. , The transmission vibration is large, the hook is easy to break, and the disassembly and assembly are laborious.
为达此目的，本发明采用以下技术方案：To achieve this goal, the present invention adopts the following technical solutions:
一种扭矩传递机构，包括第一传动件、第二传动件以及位于所述第一传动件和第二传动件之间的弹性缓冲件，所述弹性缓冲件被配置为缓冲并传递所述第一传动件的扭矩于所述第二传动件。A torque transmission mechanism includes a first transmission member, a second transmission member, and an elastic buffer member located between the first transmission member and the second transmission member. The elastic buffer member is configured to buffer and transmit the first transmission member. The torque of a transmission member is the second transmission member.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件呈环状，所述弹性缓冲件的外周面与所述第一传动件形成弹性挤压面接触，所述弹性缓冲件的内周面与所述第二传动件形成弹性挤压面接触。As a preferred technical solution of the torque transmission mechanism, the elastic buffer member is ring-shaped, the outer peripheral surface of the elastic buffer member forms an elastic pressing surface contact with the first transmission member, and the inner peripheral surface of the elastic buffer member is in contact with the first transmission member. The second transmission member forms an elastic pressing surface contact.
作为扭矩传递机构的优选技术方案，所述第一传动件的内端面上设置有第一传动件圆柱，所述第二传动件的外端面上设置有第二传动件圆环，所述第二传动件圆环套设在所述第一传动件圆柱上，所述弹性缓冲件弹性挤压于所述第一传动件的内圆面与所述第二传动件圆环的外圆面之间。As a preferred technical solution of the torque transmission mechanism, a first transmission member cylinder is provided on the inner end surface of the first transmission member, a second transmission member ring is provided on the outer end surface of the second transmission member, and the second transmission member The transmission member ring is sleeved on the first transmission member cylinder, and the elastic buffer member is elastically extruded between the inner circular surface of the first transmission member and the outer circular surface of the second transmission member .
作为扭矩传递机构的优选技术方案，所述第一传动件圆柱的几何中心和旋转中线均位于轴线X上；所述弹性缓冲件的几何中心位于轴线Y上，所述弹性缓冲件的旋转中心位于所述轴线X上；所述第二传动件圆环的几何中心位于所述轴线Y上，所述第二传动件圆环的旋转中心位于所述轴线X上，其中所述轴线X与所述轴线Y相互平行且间隔设置。As a preferred technical solution of the torque transmission mechanism, the geometric center and the rotation center of the first transmission member cylinder are both located on the axis X; the geometric center of the elastic buffer member is located on the axis Y, and the rotation center of the elastic buffer member is located On the axis X; the geometric center of the second transmission member ring is located on the axis Y, and the rotation center of the second transmission member ring is located on the axis X, where the axis X and the The axes Y are parallel to each other and arranged at intervals.
作为扭矩传递机构的优选技术方案，所述轴线Y上的点相对于所述轴线X上的点的偏心率为0.2-0.3。As a preferred technical solution of the torque transmission mechanism, the eccentricity of the point on the axis Y with respect to the point on the axis X is 0.2-0.3.
作为扭矩传递机构的优选技术方案，轴线Y上的点相对于所述轴线X上的点的偏心率为0.28。As a preferred technical solution of the torque transmission mechanism, the eccentricity of the point on the axis Y with respect to the point on the axis X is 0.28.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的内圆半径与所述弹性缓冲件的外圆半径的比值为0.4-0.5。As a preferred technical solution of the torque transmission mechanism, the ratio of the inner radius of the elastic buffer to the outer radius of the elastic buffer is 0.4-0.5.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的内圆半径与所述弹性缓冲件的外圆半径的比值为0.46。As a preferred technical solution of the torque transmission mechanism, the ratio of the inner radius of the elastic buffer to the outer radius of the elastic buffer is 0.46.
作为扭矩传递机构的优选技术方案，所述第一传动件的内圆面上沿所述第一传动件的内圆面的圆周方向间隔设置有若干槽体。As a preferred technical solution of the torque transmission mechanism, a plurality of grooves are arranged on the inner circular surface of the first transmission member at intervals along the circumferential direction of the inner circular surface of the first transmission member.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的端面设置有倒角。As a preferred technical solution of the torque transmission mechanism, the end surface of the elastic buffer member is provided with a chamfer.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的外周面与与所述第一传动件的内周面相卡接，所述弹性缓冲件的内周面与所述第二传动件的外周面相卡接。As a preferred technical solution of the torque transmission mechanism, the outer peripheral surface of the elastic buffer member is clamped with the inner peripheral surface of the first transmission member, and the inner peripheral surface of the elastic buffer member is connected with the outer periphery of the second transmission member. Face-to-face snap connection.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的外周面设有第一卡槽，所述第一传动件的内周面设有第一卡块，所述第一卡块卡接于所述第一卡槽。As a preferred technical solution of the torque transmission mechanism, the outer peripheral surface of the elastic buffer member is provided with a first clamping groove, the inner peripheral surface of the first transmission member is provided with a first clamping block, and the first clamping block is clamped to The first card slot.
作为扭矩传递机构的优选技术方案，所述第一卡块与所述第一卡槽之间，和/或所述弹性缓冲件的外周面与所述第一传动件的内周面之间形成有第一间隙。As a preferred technical solution of the torque transmission mechanism, between the first locking block and the first locking groove, and/or between the outer circumferential surface of the elastic buffer member and the inner circumferential surface of the first transmission member There is the first gap.
作为扭矩传递机构的优选技术方案，所述第一卡槽呈扇形结构，且沿所述弹性缓冲件的内周面指向外周面的方向，所述第一卡槽的宽度逐渐增大。As a preferred technical solution of the torque transmission mechanism, the first slot has a fan-shaped structure, and the width of the first slot gradually increases along the direction that the inner circumferential surface of the elastic buffer member points to the outer circumferential surface.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的内周面设有第二卡槽，所述第二传动件的外周面设有第二卡块，所述第二卡块卡接于所述第二卡槽。As a preferred technical solution of the torque transmission mechanism, the inner peripheral surface of the elastic buffer member is provided with a second clamping groove, the outer peripheral surface of the second transmission member is provided with a second clamping block, and the second clamping block is clamped to The second card slot.
作为扭矩传递机构的优选技术方案，所述第二卡块与所述第二卡槽之间，和/或所述弹性缓冲件的内周面与所述第二传动件的外周面之间形成有第二间隙。As a preferred technical solution of the torque transmission mechanism, between the second locking block and the second locking groove, and/or between the inner peripheral surface of the elastic buffer member and the outer peripheral surface of the second transmission member is formed There is a second gap.
作为扭矩传递机构的优选技术方案，所述第二卡槽呈扇形结构，且沿所述弹性缓冲件的内周面指向外周面的方向，所述第二卡槽的宽度逐渐增大。As a preferred technical solution of the torque transmission mechanism, the second slot has a fan-shaped structure, and the width of the second slot gradually increases along the direction in which the inner circumferential surface of the elastic buffer member points to the outer circumferential surface.
作为扭矩传递机构的优选技术方案，所述第一卡槽设有至少两个，且至少两个所述第一卡槽周向均布于所述弹性缓冲件的外周面；As a preferred technical solution of the torque transmission mechanism, at least two of the first clamping slots are provided, and at least two of the first clamping slots are circumferentially evenly distributed on the outer peripheral surface of the elastic buffer member;
和/或，所述第二卡槽设有至少两个，且至少两个所述第二卡槽周向均布于所述弹性缓冲件的内周面。And/or, there are at least two second clamping grooves, and at least two second clamping grooves are evenly distributed on the inner circumferential surface of the elastic buffer member in a circumferential direction.
作为扭矩传递机构的优选技术方案，所述弹性缓冲件的材质为聚氨酯弹性体。As a preferred technical solution of the torque transmission mechanism, the material of the elastic buffer member is polyurethane elastomer.
一种电起动装置，包括以上任一方案中所述的扭矩传递机构。An electric starting device includes the torque transmission mechanism described in any of the above solutions.
一种电起动引擎，包括上述电起动装置。An electric starting engine includes the above electric starting device.
一种园林工具，包括上述电起动引擎。A garden tool includes the above-mentioned electric start engine.
本发明的有益效果：The beneficial effects of the present invention:
本发明提供的扭矩传递机构，包括第一传动件、第二传动件以及位于第一传动件和第二传动件之间的弹性缓冲件，通过采用弹性缓冲件来传递扭矩，使得第一传动件的扭矩传递过程中先被弹性缓冲件暂时缓冲，随后由弹性缓冲件将扭矩传递给第二传动件，解决了现有技术中齿轮与涡簧之间以及涡簧与棘轮之间连接的勾爪易断裂的问题，而且弹性缓冲件制作工艺简单、成本低、传递噪音小，而且拆装易操作，无需额外安装安全防护部件。The torque transmission mechanism provided by the present invention includes a first transmission member, a second transmission member, and an elastic buffer member located between the first transmission member and the second transmission member. The elastic buffer member is used to transmit torque, so that the first transmission member During the torque transmission process, the elastic buffer member is temporarily buffered, and then the elastic buffer member transmits the torque to the second transmission member, which solves the problem of the hooks connecting the gear and the volute spring and between the volute spring and the ratchet in the prior art. It is easy to break, and the elastic buffer member has a simple manufacturing process, low cost, low transmission noise, and easy disassembly and assembly, without the need to install additional safety protection components.
附图说明Description of the drawings
图1是现有技术中扭矩传递机构的结构示意图一；Fig. 1 is a first structural diagram of a torque transmission mechanism in the prior art;
图2是现有技术中扭矩传递机构的结构示意图二；Figure 2 is a second structural diagram of a torque transmission mechanism in the prior art;
图3是本发明实施例一所述的扭矩传递机构的分解视图；Figure 3 is an exploded view of the torque transmission mechanism according to the first embodiment of the present invention;
图4是本发明实施例一所述的扭矩传递机构的主视图；4 is a front view of the torque transmission mechanism according to the first embodiment of the present invention;
图5是图4中A-A方向的剖视图；Figure 5 is a cross-sectional view in the direction of A-A in Figure 4;
图6是本发明实施例二所述的扭矩传递机构的分解视图；Figure 6 is an exploded view of the torque transmission mechanism according to the second embodiment of the present invention;
图7是本发明实施例二所述的扭矩传递机构的主视图；Figure 7 is a front view of the torque transmission mechanism according to the second embodiment of the present invention;
图8是图4中B-B方向的剖视图；Figure 8 is a cross-sectional view in the direction of B-B in Figure 4;
图9是本发明实施例二所述的扭矩传递机构的装配结构剖视图。9 is a cross-sectional view of the assembly structure of the torque transmission mechanism according to the second embodiment of the present invention.
图中：In the picture:
10’-齿轮；11’-第二槽体；20’-涡簧；21’-第一勾爪；22’-第二勾爪；30’-棘轮；31’-第一槽体；10'-Gear; 11'-Second Slot; 20'-Volute Spring; 21'-First Claw; 22'-Second Claw; 30'-Ratchet; 31'-First Slot;
10-第一传动件；11-第一传动件圆柱；12-槽体；20-弹性缓冲件；30-第二传动件；31-第二传动件圆环；41-固定柱；42-垫片；43-螺栓；10-first transmission member; 11-first transmission member cylinder; 12-tank body; 20-elastic buffer member; 30-second transmission member; 31-second transmission member ring; 41-fixed column; 42-pad Piece; 43-bolt;
101、第一卡块；102、第一间隙；201、第一卡槽；202、第二卡槽；301、第二卡块；302、第二间隙。101. The first card block; 102. The first gap; 201. The first card slot; 202. The second card slot; 301. The second card block; 302. The second gap.
具体实施方式detailed description
下面结合附图和实施方式进一步说明本发明的技术方案。可以理解的是，此处所描述的具体实施例仅仅用于解释本发明，而非对本发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本发明相关的部分而非全部。The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show parts related to the present invention, but not all.
在本发明的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于 本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise clearly defined and defined, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the first feature has a lower level than the second feature.
在本实施例的描述中，术语“上”、“下”、“左”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。In the description of this embodiment, the terms "upper", "lower", "left", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for ease of description and simplified operations , Rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish them in description and have no special meaning.
实施例一Example one
本实施例提供一种扭矩传递机构，如图3-5所示，包括第一传动件10、第二传动件30以及位于第一传动件10和第二传动件30之间的弹性缓冲件20，且弹性缓冲件20分别与第一传动件10和第二传动件30形成弹性挤压面接触并产生静摩擦力，通过静摩擦力将第一传动件10的扭矩传递给第二传动件30。在本实施例中，第一传动件10为齿轮，第二传动件30为棘轮。通过采用弹性缓冲件20来传递扭矩，使得弹性缓冲件20分别与第一传动件10和第二传动件30的传动接触面变大，解决了现有技术中齿轮10与涡簧之间以及涡簧与棘轮30之间连接的勾爪易断裂的问题，而且弹性缓冲件20制作工艺简单、成本低、传 递噪音小，而且拆装易操作，无需额外安装安全防护部件。This embodiment provides a torque transmission mechanism, as shown in FIGS. 3-5, including a first transmission member 10, a second transmission member 30, and an elastic buffer member 20 located between the first transmission member 10 and the second transmission member 30 , And the elastic buffer member 20 respectively forms elastic pressing surface contact with the first transmission member 10 and the second transmission member 30 and generates static friction force, and the torque of the first transmission member 10 is transmitted to the second transmission member 30 through the static friction force. In this embodiment, the first transmission member 10 is a gear, and the second transmission member 30 is a ratchet. By adopting the elastic buffer member 20 to transmit torque, the transmission contact surfaces of the elastic buffer member 20 and the first transmission member 10 and the second transmission member 30 are enlarged, which solves the problem of the gap between the gear 10 and the vortex spring in the prior art. The hook claw connected between the spring and the ratchet wheel 30 is easy to break, and the elastic buffer member 20 has a simple manufacturing process, low cost, low transmission noise, easy disassembly and assembly, and no need to install additional safety protection components.
在本实施例中，弹性缓冲件20呈环状，弹性缓冲件20的外周面与第一传动件10形成弹性挤压面接触，弹性缓冲件20的内周面与第二传动件30形成弹性挤压面接触。具体地，第一传动件10的内端面上设置有第一传动件圆柱11，第二传动件30的外端面上设置有第二传动件圆环31，第二传动件圆环31套设在第一传动件圆柱11上，弹性缓冲件20弹性挤压于第一传动件10的内圆面与第二传动件圆环31的外圆面之间，利用第一传动件10内圆面与弹性缓冲件20外圆面、以及弹性缓冲件20内圆面与第二传动件圆环31外圆面之间的静摩擦力，能够将第一传动件10的扭矩传递给第二传动件30。或者，在其他实施例中，也可以是弹性缓冲件20的两个端面分别与第一传动件10和第二传动件30的端面挤压接触。In this embodiment, the elastic buffer member 20 is annular, the outer peripheral surface of the elastic buffer member 20 forms an elastic pressing surface contact with the first transmission member 10, and the inner peripheral surface of the elastic buffer member 20 and the second transmission member 30 form elasticity. Squeeze surface contact. Specifically, the inner end surface of the first transmission member 10 is provided with a first transmission member cylinder 11, the outer end surface of the second transmission member 30 is provided with a second transmission member ring 31, and the second transmission member ring 31 is sleeved on On the first transmission member cylinder 11, the elastic buffer member 20 is elastically extruded between the inner circular surface of the first transmission member 10 and the outer circular surface of the second transmission member ring 31, using the inner circular surface of the first transmission member 10 and The static friction force between the outer circular surface of the elastic buffer member 20 and the inner circular surface of the elastic buffer member 20 and the outer circular surface of the second transmission member ring 31 can transmit the torque of the first transmission member 10 to the second transmission member 30. Or, in other embodiments, the two end surfaces of the elastic buffer member 20 may be in pressing contact with the end surfaces of the first transmission member 10 and the second transmission member 30 respectively.
第一传动件10、弹性缓冲件20和第二传动件30通过紧固组件紧固连接，紧固组件包括固定柱41和螺栓43，第一传动件圆柱11设置有中空腔，固定柱41设置于第一传动件圆柱11的中空腔内，固定柱41上开设有螺纹孔，第二传动件30设置第二传动件圆环31的端面上开设有通孔，螺栓43穿过通孔后与螺纹孔螺纹连接，从而将第一传动件10和第二传动件30紧固连接，且第二传动件30的端面抵压在弹性缓冲件20上，从而将弹性缓冲件20固定。进一步地，紧固组件还包括垫片42，垫片42垫设于螺栓43的螺栓头与第二传动件30的内端面之间。The first transmission member 10, the elastic buffer member 20 and the second transmission member 30 are fastened and connected by a fastening component. The fastening component includes a fixed post 41 and a bolt 43. The first transmission component cylinder 11 is provided with a hollow cavity, and the fixed post 41 is provided In the hollow cavity of the first transmission member cylinder 11, a threaded hole is opened on the fixing column 41, and a through hole is opened on the end surface of the second transmission member 30 where the second transmission member ring 31 is provided. The threaded hole is threaded to connect the first transmission member 10 and the second transmission member 30 tightly, and the end surface of the second transmission member 30 is pressed against the elastic buffer member 20 to fix the elastic buffer member 20. Further, the fastening assembly further includes a gasket 42 which is provided between the bolt head of the bolt 43 and the inner end surface of the second transmission member 30.
优选地，弹性缓冲件20的材质为聚氨酯弹性体，聚氨酯弹性体材料具有50％压缩量，复原弹性强，聚氨酯弹性体材料本身具有耐压、耐磨、耐冲击、耐油、耐酸碱、抗撕裂的特性，能满足电起动装置对其的基本要求，且其硬度从邵氏25-98度可选，可根据使用空间、负载等的延展试验选配，可以综合出最适配使 用场合的效果。可选地，弹性缓冲件20的材质可以为优力胶，优力胶又称聚氨酯PU弹性体，是一种具有强度好，压缩变形小，介于塑料和橡胶之间的一种新型材料，具有塑料的刚性，又有橡胶的弹性。当然，弹性缓冲件20的材质并不局限于聚氨酯弹性体，也可以为普通的弹性体材料，例如橡胶材质。Preferably, the material of the elastic buffer member 20 is polyurethane elastomer. The polyurethane elastomer material has 50% compression and strong recovery elasticity. The polyurethane elastomer material itself has pressure resistance, wear resistance, impact resistance, oil resistance, acid and alkali resistance, and The characteristics of tearing can meet the basic requirements of electric starting devices, and its hardness can be selected from 25-98 degrees Shore. It can be selected according to the extension test of the use space, load, etc., and the most suitable application can be synthesized. Effect. Optionally, the material of the elastic buffer member 20 can be Uniglue, which is also called polyurethane PU elastomer, which is a new type of material with good strength, small compression deformation, and between plastic and rubber. It has the rigidity of plastic and the elasticity of rubber. Of course, the material of the elastic buffer member 20 is not limited to polyurethane elastomer, and may also be a common elastomer material, such as a rubber material.
优选地，弹性缓冲件20的端面设置有倒角，以便于弹性缓冲件20的装配。Preferably, the end surface of the elastic buffer member 20 is provided with a chamfer to facilitate the assembly of the elastic buffer member 20.
优选地，第一传动件10的内圆面上沿其圆周方向间隔设置有若干槽体12，通过槽体12的设置能够增大第一传动件10的内圆面与弹性缓冲件20的外圆面之间的摩擦力，进而增加了第一传动件10与第二传动件30间扭矩的传递。Preferably, the inner circular surface of the first transmission member 10 is provided with a plurality of grooves 12 at intervals along its circumferential direction. The arrangement of the grooves 12 can increase the inner circular surface of the first transmission member 10 and the outer surface of the elastic buffer member 20. The friction force between the circular surfaces further increases the torque transmission between the first transmission member 10 and the second transmission member 30.
进一步地，如图5所示，第一传动件圆柱11的几何中心和旋转中线均位于轴线X上；弹性缓冲件20的几何中心位于轴线Y上，弹性缓冲件20的旋转中心位于轴线X上；第二传动件圆环31的几何中心位于轴线Y上，第二传动件圆环31的旋转中心位于轴线X上，其中轴线X与轴线Y相互平行且间隔设置。在本实施例中，第一传动件10的内圆面相对于外圆面偏心设置，即第一传动件10沿圆周方向的一点至相对的另一点壁厚逐渐增加，第一传动件圆柱11与第一传动件10的外圆面同心；弹性缓冲件20的内圆面和外圆面同心设置，即弹性缓冲件20沿圆周方向为等壁厚设置；第二传动件圆环31的内圆面相对于外圆面偏心设置，即第二传动件圆环31沿圆周方向的一点至相对的另一点壁厚逐渐增加，且第二传动件圆环31的壁厚最厚点与第一传动件10的壁厚最薄点正对，第二传动件圆环31的壁厚最薄点与第一传动件10的壁厚最厚点正对。或者，在其他实施例中，弹性缓冲件20的外圆面相对于内圆面偏心设置，第一传动件10的内圆面和外圆面同心设置，第二传动件圆环31的外圆面相对于内圆面偏心设置。再或者，在又一其他实施例中，弹性缓冲件20的内圆面相对于外圆面偏心设置，第一传动件10的内圆面相对于外圆面偏心设置，第二传动件圆环31 的内圆面和外圆面同心设置。通过上述设置，能够增大第一传动件10内圆面与弹性缓冲件20的外圆面之间、以及弹性缓冲件20的内圆面与第二传动件圆环31的外圆面之间的静摩擦力，进而增大第一传动件10与第二传动件30之间传递的扭矩。Further, as shown in FIG. 5, the geometric center and the center of rotation of the first transmission member cylinder 11 are located on the axis X; the geometric center of the elastic buffer member 20 is located on the axis Y, and the rotation center of the elastic buffer member 20 is located on the axis X The geometric center of the second transmission member ring 31 is located on the axis Y, and the rotation center of the second transmission member ring 31 is located on the axis X, wherein the axis X and the axis Y are parallel to each other and arranged at intervals. In this embodiment, the inner circular surface of the first transmission member 10 is eccentrically arranged with respect to the outer circular surface, that is, the wall thickness of the first transmission member 10 gradually increases from one point in the circumferential direction to the opposite point, and the first transmission member cylinder 11 and The outer circular surface of the first transmission member 10 is concentric; the inner circular surface and the outer circular surface of the elastic buffer member 20 are arranged concentrically, that is, the elastic buffer member 20 is arranged with equal wall thickness along the circumferential direction; the inner circle of the second transmission member ring 31 The surface is eccentrically arranged with respect to the outer circular surface, that is, the wall thickness of the second transmission member ring 31 along the circumferential direction gradually increases to the opposite point, and the wall thickness of the second transmission member ring 31 is the thickest point of the first transmission member The thinnest point of the wall thickness of 10 is directly opposite, and the thinnest point of the wall thickness of the second transmission member ring 31 is directly opposite to the thickest point of the first transmission member 10. Or, in other embodiments, the outer circular surface of the elastic buffer member 20 is eccentrically arranged with respect to the inner circular surface, the inner circular surface and the outer circular surface of the first transmission member 10 are arranged concentrically, and the outer circular surface of the second transmission member ring 31 is opposite to each other. For the eccentric setting of the inner circle. Or, in yet another embodiment, the inner circular surface of the elastic buffer member 20 is eccentrically arranged with respect to the outer circular surface, the inner circular surface of the first transmission member 10 is eccentrically arranged with respect to the outer circular surface, and the second transmission member ring 31 The inner circular surface and the outer circular surface are arranged concentrically. Through the above arrangement, it is possible to increase the distance between the inner circular surface of the first transmission member 10 and the outer circular surface of the elastic buffer member 20, and between the inner circular surface of the elastic buffer member 20 and the outer circular surface of the second transmission member ring 31. The static friction force, thereby increasing the torque transmitted between the first transmission member 10 and the second transmission member 30.
参见图5，轴线Y上的点相对于轴线X上的点的偏心设置，且偏心率为e，则e＝(L1-L2)/r，其中，L1为弹性缓冲件20的旋转中心到弹性缓冲件20的外圆的最大距离，L2为弹性缓冲件20的旋转中心到所述弹性缓冲件20的外圆的最小距离，r为弹性缓冲件20的内圆半径。偏心率与运动产生的摩擦力成正相关关系，偏心率对弹性缓冲件20的性能影响主要取决于需要传递的摩擦力，而需要传递的摩擦力取决于外接负载的大小，只要保证在传递的摩擦力能够稳定的大于负载就可以满足设计要求。优选地，偏心率e＝0.2～0.3。进一步优选地，偏心率e＝0.28。5, the point on the axis Y is set eccentrically with respect to the point on the axis X, and the eccentricity is e, then e=(L1-L2)/r, where L1 is the rotation center of the elastic buffer 20 to elastic The maximum distance of the outer circle of the buffer member 20, L2 is the minimum distance from the rotation center of the elastic buffer member 20 to the outer circle of the elastic buffer member 20, and r is the inner circle radius of the elastic buffer member 20. The eccentricity is positively correlated with the friction generated by the movement. The effect of the eccentricity on the performance of the elastic buffer member 20 mainly depends on the friction to be transmitted, and the friction to be transmitted depends on the size of the external load. As long as the friction is ensured The force can be stably greater than the load to meet the design requirements. Preferably, the eccentricity e=0.2~0.3. More preferably, the eccentricity e=0.28.
进一步地，弹性缓冲件20的内圆半径和外圆半径的比值为k，即k＝r/R，其中r为弹性缓冲件20的內圆半径，R为弹性缓冲件20的外圆半径，偏心率e和半径比k共同决定了弹性缓冲件20的结构性能。优选地，k＝0.4～0.5。进一步优选地，k＝0.46。Further, the ratio of the inner radius to the outer radius of the elastic buffer member 20 is k, that is, k=r/R, where r is the inner radius of the elastic buffer member 20, and R is the outer radius of the elastic buffer member 20, The eccentricity e and the radius ratio k jointly determine the structural performance of the elastic buffer member 20. Preferably, k=0.4-0.5. More preferably, k=0.46.
经过实际的起动试验验证，该电起动装置的起动成功率较高，具体地，试验结果如下：实际进行起动实验1220次，一次起动成功1201次，失败19次，失败后的第二次起动全部成功，即一次起动成功率>98％，二次起动成功率100％。Through actual starting test verification, the starting success rate of the electric starting device is relatively high. Specifically, the test results are as follows: the actual starting experiment is carried out 1220 times, one start is successful 1201 times, there are 19 failures, and the second start after the failure is all Success means that the first start success rate is >98%, and the second start success rate is 100%.
本实施例还提供一种电起动装置，包括上述扭矩传递机构。This embodiment also provides an electric starting device including the torque transmission mechanism described above.
本实施例还提供一种电起动引擎，包括上述电起动装置。This embodiment also provides an electric starter engine including the electric starter described above.
本实施例还提供一种园林工具，包括上述电起动引擎。具体地，园林工具 可以为打草机、割草机、割灌机、翻土机、修枝机、链锯、高枝剪、吹吸机等。This embodiment also provides a garden tool including the above-mentioned electric start engine. Specifically, the garden tools can be lawn mowers, lawn mowers, brush cutters, tillers, pruners, chainsaws, high branch shears, suction blowers, and the like.
实施例二Example two
本实施例提供一种扭矩传递机构，如图6-8所示，该扭矩传递机构包括第一传动件10、第二传动件30以及位于第一传动件10和第二传动件30之间的弹性缓冲件20，其中第一传动件10的内周面与弹性缓冲件20的外周面之间、第二传动件30的外周面与弹性缓冲件20的内周面之间通过卡接的方式连接，通过上述卡接方式，在第一传动件10传递扭矩时，第一传动件10先传递扭矩于弹性缓冲件20，由弹性缓冲件20进行短时的缓冲，随后弹性缓冲件20将扭矩传递给第二传动件20，能够有效解决现有技术中齿轮10与涡簧之间以及涡簧与棘轮30之间连接的勾爪易断裂的问题，而且上述弹性缓冲件20制作工艺简单、成本低、传递噪音小，而且拆装易操作，无需额外安装安全防护部件。本实施例中，上述第一传动件10为齿轮，第二传动件30为棘轮。This embodiment provides a torque transmission mechanism, as shown in FIGS. 6-8, the torque transmission mechanism includes a first transmission member 10, a second transmission member 30, and a second transmission member 30 between the first transmission member 10 and the second transmission member 30. The elastic buffer member 20, wherein the inner circumferential surface of the first transmission member 10 and the outer circumferential surface of the elastic buffer member 20, and the outer circumferential surface of the second transmission member 30 and the inner circumferential surface of the elastic buffer member 20 are clamped When the first transmission member 10 transmits torque, the first transmission member 10 first transmits the torque to the elastic buffer member 20, and the elastic buffer member 20 performs short-term buffering, and then the elastic buffer member 20 transfers the torque The transmission to the second transmission member 20 can effectively solve the problem of easy breakage of the hooks between the gear 10 and the volute spring and between the volute spring and the ratchet 30 in the prior art, and the above-mentioned elastic buffer member 20 has simple manufacturing process and cost. Low, low transmission noise, easy to disassemble and assemble, no need to install additional safety protection parts. In this embodiment, the above-mentioned first transmission member 10 is a gear, and the second transmission member 30 is a ratchet.
于本实施例中，可参照图6，上述弹性缓冲件20呈环状结构，且本实施例中，在弹性缓冲件20的外周面上设有第一卡槽201，相应的，在第一传动件10的内周面上设有第一卡块101，该第一卡块101能够卡接于第一卡槽201，以实现第一传动件10与弹性缓冲件20的卡接，以使得第一传动件10的扭矩传递于弹性缓冲件20。可选地，本实施例的上述第一卡槽201设置有至少两个(图6中设置为三个)，且至少两个第一卡槽201均布开设于弹性缓冲件20的外周面，相应的，在第一传动件10的内周面上设有与第一卡槽201数量相同的第一卡块101。通过设置至少两个第一卡槽201以及至少两个第一卡块101，能够使得第一传动件10的扭矩更加稳定的传递于弹性缓冲件20。In this embodiment, referring to FIG. 6, the above-mentioned elastic buffer member 20 has a ring structure, and in this embodiment, a first slot 201 is provided on the outer peripheral surface of the elastic buffer member 20. A first clamping block 101 is provided on the inner circumferential surface of the transmission member 10, and the first clamping block 101 can be clamped to the first clamping slot 201 to realize the clamping connection between the first transmission member 10 and the elastic buffer member 20, so that The torque of the first transmission member 10 is transmitted to the elastic buffer member 20. Optionally, there are at least two (three in FIG. 6) of the above-mentioned first card slots 201 in this embodiment, and the at least two first card slots 201 are evenly distributed on the outer peripheral surface of the elastic buffer member 20, Correspondingly, the inner peripheral surface of the first transmission member 10 is provided with the same number of first clamping blocks 101 as the first clamping slots 201. By providing at least two first locking slots 201 and at least two first locking blocks 101, the torque of the first transmission member 10 can be transmitted to the elastic buffer member 20 more stably.
作为优选地技术方案，本实施例中，上述第一卡槽201呈扇形结构，且沿 弹性缓冲件20的内周面指向外周面的方向，第一卡槽201的宽度逐渐增大。上述第一卡块101的形状与上述第一卡槽201相匹配。该结构的设置，能够使得第一卡块101与第一卡槽201的接触面积更大，进而使得扭矩的传递更平稳，且使得弹性缓冲件20的短时缓冲效果更佳。As a preferred technical solution, in this embodiment, the first slot 201 has a fan-shaped structure, and the width of the first slot 201 gradually increases along the direction from the inner circumferential surface of the elastic buffer member 20 to the outer circumferential surface. The shape of the first locking block 101 matches the first locking slot 201. The arrangement of this structure can make the contact area between the first locking block 101 and the first locking slot 201 larger, thereby making the torque transmission more stable, and making the elastic buffer member 20 have a better short-term buffering effect.
更进一步的，本实施例中，如图9所示，相互卡接的第一卡块101与第一卡槽201之间形成有第一间隙102，该第一间隙102可以形成于第一卡块101的端部与第一卡槽201的底部之间，也可以形成于第一卡块101的侧壁与第一卡槽201的侧壁之间，还可以形成于第一卡块101的端部与第一卡槽201的底部之间以及第一卡块101的侧壁与第一卡槽201的侧壁之间。还可以形成于弹性缓冲件20的外周面与第一传动件10的内周面之间。通过上述第一间隙102，能够为弹性缓冲件20的弹性伸缩提供空间，进一步提高弹性缓冲件20的弹性缓冲效果。Furthermore, in this embodiment, as shown in FIG. 9, a first gap 102 is formed between the first card block 101 and the first card slot 201 that are clamped to each other. The first gap 102 may be formed in the first card slot. Between the end of the block 101 and the bottom of the first card slot 201, it can also be formed between the side wall of the first card block 101 and the side wall of the first card slot 201, or between the side wall of the first card block 101. Between the end and the bottom of the first card slot 201 and between the side wall of the first card block 101 and the side wall of the first card slot 201. It may also be formed between the outer circumferential surface of the elastic buffer member 20 and the inner circumferential surface of the first transmission member 10. Through the above-mentioned first gap 102, space can be provided for the elastic expansion and contraction of the elastic buffer member 20, and the elastic buffer effect of the elastic buffer member 20 is further improved.
如图6所示，在弹性缓冲件20的内周面设有第二卡槽202，相应的在第二传动件30的内周面设有第二卡块301，该第二卡块301卡接于第二卡槽202，以实现弹性缓冲件20与第二传动件30之间的卡接。本实施例中，上述第二卡槽202可以设置至少两个(图6中设置为三个)，且两个第二卡槽202周向均布的开设于弹性缓冲件20的内周面，相应的，在第二传动件20的外周面上设有与第二卡槽202数量相同的第二卡块301。通过设置至少两个第二卡槽202以及至少两个第二卡块301，在弹性缓冲件20接收到第一传动件10传递的扭矩后，能够将该扭矩传递给第二传动件30，实现了第一传动件10和第二传动件20之间扭矩的传递。As shown in FIG. 6, a second locking groove 202 is provided on the inner peripheral surface of the elastic buffer member 20, and correspondingly a second locking block 301 is provided on the inner peripheral surface of the second transmission member 30, and the second locking block 301 is locked It is connected to the second slot 202 to realize the snap connection between the elastic buffer member 20 and the second transmission member 30. In this embodiment, at least two second card slots 202 can be provided (three in FIG. 6), and the two second card slots 202 are evenly distributed in the circumferential direction on the inner peripheral surface of the elastic buffer member 20, correspondingly , The outer peripheral surface of the second transmission member 20 is provided with the same number of second clamping blocks 301 as the second clamping slots 202. By providing at least two second locking slots 202 and at least two second locking blocks 301, after the elastic buffer member 20 receives the torque transmitted by the first transmission member 10, the torque can be transmitted to the second transmission member 30 to achieve The torque transmission between the first transmission member 10 and the second transmission member 20 is achieved.
本实施例中，上述第二卡槽202也呈扇形结构，且沿弹性缓冲件20的内周面指向外周面的方向，第二卡槽202的宽度逐渐增大。以使得第二卡块301与 第二卡槽202的接触面积更大，增加扭矩传递效果。而且第二卡槽202的结构，也能够使得弹性缓冲件20与第二传动件30之间的卡接更加稳定。如图9所示，本实施例中，相互卡接的第二卡块301与第二卡槽202之间形成有第二间隙302，该第二间隙302可以形成于第二卡块301的端部与第二卡槽202的底部之间，也可以形成于第二卡块301的侧壁与第二卡槽202的侧壁之间，还可以形成于第二卡块301的端部与第二卡槽202的底部之间以及第二卡块301的侧壁与第二卡槽202的侧壁之间。还可以形成于弹性缓冲件20的内周面与第二传动件30的外周面之间。通过上述第二间隙302，能够为弹性缓冲件20的弹性伸缩提供空间，进一步提高弹性缓冲件20的弹性缓冲效果。In this embodiment, the second slot 202 also has a fan-shaped structure, and the width of the second slot 202 gradually increases along the direction that the inner peripheral surface of the elastic buffer member 20 points to the outer peripheral surface. In this way, the contact area between the second clamping block 301 and the second clamping slot 202 is larger, and the torque transmission effect is increased. Moreover, the structure of the second slot 202 can also make the engagement between the elastic buffer member 20 and the second transmission member 30 more stable. As shown in FIG. 9, in this embodiment, a second gap 302 is formed between the second clamping block 301 and the second clamping slot 202 that are clamped to each other. The second gap 302 may be formed at the end of the second clamping block 301. Between the bottom portion and the bottom of the second card slot 202, it can also be formed between the side wall of the second card block 301 and the side wall of the second card slot 202, and can also be formed between the end of the second card block 301 and the second card slot 202. Between the bottoms of the two card slots 202 and between the side walls of the second card block 301 and the side walls of the second card slot 202. It may also be formed between the inner peripheral surface of the elastic buffer member 20 and the outer peripheral surface of the second transmission member 30. The second gap 302 can provide space for the elastic expansion and contraction of the elastic buffer member 20 and further improve the elastic buffer effect of the elastic buffer member 20.
本实施例中，上述弹性缓冲件20的材质为聚氨酯弹性体，优选地可以是优力胶，优力胶又称聚氨酯PU弹性体，是一种具有强度好，压缩变形小，介于塑料和橡胶之间的一种新型材料，具有塑料的刚性，又有橡胶的弹性。In this embodiment, the material of the above-mentioned elastic buffering member 20 is polyurethane elastomer, preferably it can be Uniglue, which is also called polyurethane PU elastomer, which has good strength, small compression deformation, and is between plastic and A new type of material between rubber, which has the rigidity of plastic and the elasticity of rubber.
本实施例还提供一种电起动装置，包括上述扭矩传递机构。This embodiment also provides an electric starting device including the torque transmission mechanism described above.
本实施例还提供一种电起动引擎，包括上述电起动装置。This embodiment also provides an electric starter engine including the electric starter described above.
本实施例还提供一种园林工具，包括上述电起动引擎。具体地，园林工具可以为打草机、割草机、割灌机、翻土机、修枝机、链锯、高枝剪、吹吸机等。This embodiment also provides a garden tool including the above-mentioned electric start engine. Specifically, the garden tool may be a lawn mower, a lawn mower, a brush cutter, a tiller, a pruner, a chain saw, a high branch shear, a blower and the like.
显然，本发明的上述实施例仅仅是为了清楚说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。Obviously, the foregoing embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all implementation methods here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

  1. 一种扭矩传递机构，其特征在于，包括第一传动件(10)、第二传动件(30)以及位于所述第一传动件(10)和第二传动件(30)之间的弹性缓冲件(20)，所述弹性缓冲件(20)被配置为缓冲并传递所述第一传动件(10)的扭矩于所述第二传动件(30)。A torque transmission mechanism, characterized by comprising a first transmission member (10), a second transmission member (30) and an elastic buffer located between the first transmission member (10) and the second transmission member (30) The elastic buffer member (20) is configured to buffer and transmit the torque of the first transmission member (10) to the second transmission member (30).
  2. 根据权利要求1所述的扭矩传递机构，其特征在于，所述弹性缓冲件(20)呈环状，所述弹性缓冲件(20)的外周面与所述第一传动件(10)形成弹性挤压面接触，所述弹性缓冲件(20)的内周面与所述第二传动件(30)形成弹性挤压面接触。The torque transmission mechanism according to claim 1, wherein the elastic buffer member (20) is annular, and the outer peripheral surface of the elastic buffer member (20) and the first transmission member (10) form elastic The pressing surface contacts, and the inner peripheral surface of the elastic buffer member (20) and the second transmission member (30) form an elastic pressing surface contact.
  3. 根据权利要求2所述的扭矩传递机构，其特征在于，所述第一传动件(10)的内端面上设置有第一传动件圆柱(11)，所述第二传动件(30)的外端面上设置有第二传动件圆环(31)，所述第二传动件圆环(31)套设在所述第一传动件圆柱(11)上，所述弹性缓冲件(20)弹性挤压于所述第一传动件(10)的内圆面与所述第二传动件圆环(31)的外圆面之间；所述第一传动件圆柱(11)的几何中心和旋转中线均位于轴线X上；所述弹性缓冲件(20)的几何中心位于轴线Y上，所述弹性缓冲件(20)的旋转中心位于所述轴线X上；所述第二传动件圆环(31)的几何中心位于所述轴线Y上，所述第二传动件圆环(31)的旋转中心位于所述轴线X上，其中所述轴线X与所述轴线Y相互平行且间隔设置；The torque transmission mechanism according to claim 2, characterized in that the inner end surface of the first transmission member (10) is provided with a first transmission member cylinder (11), and the outer side of the second transmission member (30) A second transmission member ring (31) is provided on the end surface, the second transmission member ring (31) is sleeved on the first transmission member cylinder (11), and the elastic buffer member (20) is elastically compressed Pressed between the inner circular surface of the first transmission member (10) and the outer circular surface of the second transmission member ring (31); the geometric center and the rotation center line of the first transmission member cylinder (11) Are located on the axis X; the geometric center of the elastic buffer member (20) is located on the axis Y, and the rotation center of the elastic buffer member (20) is located on the axis X; the second transmission member ring (31 The geometric center of) is located on the axis Y, the rotation center of the second transmission member ring (31) is located on the axis X, wherein the axis X and the axis Y are parallel to each other and arranged at intervals;
    所述轴线Y上的点相对于所述轴线X上的点的偏心率为0.2-0.3；The eccentricity of the point on the axis Y with respect to the point on the axis X is 0.2-0.3;
    所述弹性缓冲件(20)的内圆半径与所述弹性缓冲件(20)的外圆半径的比值为0.4-0.5；The ratio of the inner radius of the elastic buffer (20) to the outer radius of the elastic buffer (20) is 0.4-0.5;
    所述第一传动件(10)的内圆面上沿所述第一传动件(10)的内圆面的圆周方向间隔设置有若干槽体(12)；A plurality of grooves (12) are arranged on the inner circular surface of the first transmission member (10) at intervals along the circumferential direction of the inner circular surface of the first transmission member (10);
    所述弹性缓冲件(20)的端面设置有倒角。The end surface of the elastic buffer (20) is provided with a chamfer.
  4. 根据权利要求1所述的扭矩传递机构，其特征在于，所述弹性缓冲件(20)的外周面与所述第一传动件(10)的内周面相卡接，所述弹性缓冲件(20)的内周面与所述第二传动件(30)的外周面相卡接。The torque transmission mechanism according to claim 1, wherein the outer peripheral surface of the elastic buffer member (20) is clamped with the inner peripheral surface of the first transmission member (10), and the elastic buffer member (20) The inner peripheral surface of) is clamped with the outer peripheral surface of the second transmission member (30).
  5. 根据权利要求4所述的扭矩传递机构，其特征在于，所述弹性缓冲件(20)的外周面设有第一卡槽(201)，所述第一传动件(10)的内周面设有第一卡块(101)，所述第一卡块(101)卡接于所述第一卡槽(201)；The torque transmission mechanism according to claim 4, characterized in that the outer peripheral surface of the elastic buffer member (20) is provided with a first slot (201), and the inner peripheral surface of the first transmission member (10) is provided with There is a first clamping block (101), and the first clamping block (101) is clamped to the first clamping slot (201);
    所述第一卡块(101)与所述第一卡槽(201)之间，和/或所述弹性缓冲件(20)的外周面与所述第一传动件(10)的内周面之间形成有第一间隙(102)；Between the first locking block (101) and the first locking slot (201), and/or the outer peripheral surface of the elastic buffer member (20) and the inner peripheral surface of the first transmission member (10) A first gap (102) is formed therebetween;
    所述第一卡槽(201)呈扇形结构，且沿所述弹性缓冲件(20)的内周面指向外周面的方向，所述第一卡槽(201)的宽度逐渐增大。The first slot (201) has a fan-shaped structure, and the width of the first slot (201) gradually increases along the direction in which the inner peripheral surface of the elastic buffer member (20) points to the outer peripheral surface.
  6. 根据权利要求5所述的扭矩传递机构，其特征在于，所述弹性缓冲件(20)的内周面设有第二卡槽(202)，所述第二传动件(30)的外周面设有第二卡块(301)，所述第二卡块(301)卡接于所述第二卡槽(202)。The torque transmission mechanism according to claim 5, characterized in that the inner peripheral surface of the elastic buffer member (20) is provided with a second clamping groove (202), and the outer peripheral surface of the second transmission member (30) is provided with There is a second clamping block (301), and the second clamping block (301) is clamped to the second clamping slot (202).
  7. 根据权利要求6所述的扭矩传递机构，其特征在于，所述第二卡块(301)与所述第二卡槽(202)之间，和/或所述弹性缓冲件(20)的内周面与所述第二传动件(30)的外周面之间形成有第二间隙(302)；The torque transmission mechanism according to claim 6, characterized in that, between the second locking block (301) and the second locking slot (202), and/or the inner part of the elastic buffer member (20) A second gap (302) is formed between the peripheral surface and the outer peripheral surface of the second transmission member (30);
    所述第二卡槽(202)呈扇形结构，且沿所述弹性缓冲件(20)的内周面指向外周面的方向，所述第二卡槽(202)的宽度逐渐增大；The second slot (202) has a fan-shaped structure, and the width of the second slot (202) gradually increases along the direction that the inner circumferential surface of the elastic buffer member (20) points to the outer circumferential surface;
    所述第一卡槽(201)设有至少两个，且至少两个所述第一卡槽(201)周向均布于所述弹性缓冲件(20)的外周面；There are at least two first grooves (201), and at least two first grooves (201) are evenly distributed on the outer circumferential surface of the elastic buffer member (20) in the circumferential direction;
    和/或，所述第二卡槽(202)设有至少两个，且至少两个所述第二卡槽(202)周向均布于所述弹性缓冲件(20)的内周面。And/or, the second slot (202) is provided with at least two, and at least two of the second slot (202) are circumferentially evenly distributed on the inner peripheral surface of the elastic buffer member (20).
  8. 一种电起动装置，其特征在于，包括如权利要求1-7任一项所述的扭矩传递机构。An electric starting device, characterized by comprising the torque transmission mechanism according to any one of claims 1-7.
  9. 一种电起动引擎，其特征在于，包括如权利要求8所述的电起动装置。An electric starter engine, characterized by comprising the electric starter as claimed in claim 8.
  10. 一种园林工具，其特征在于，包括如权利要求9所述的电起动引擎。A garden tool, characterized by comprising the electric starter engine as claimed in claim 9.
PCT/CN2020/109473 2019-08-19 2020-08-17 Torque transfer mechanism, electric starting device, engine and garden tool WO2021032044A1 (en)

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