CN109296488B

CN109296488B - Hand-operated starter

Info

Publication number: CN109296488B
Application number: CN201811442744.3A
Authority: CN
Inventors: 何洪伟; 林勇
Original assignee: Taizhou Kunzheng Technology Co ltd
Current assignee: Taizhou Kunzheng Technology Co ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2023-08-22
Anticipated expiration: 2038-11-29
Also published as: CN109296488A

Abstract

The invention provides a hand-operated starter, and belongs to the technical field of machinery. The starter solves the problems that the existing starter is low in applicability and cannot be used for various types of machines. The novel rotary power transmission device comprises a body and a starting mechanism and an output shaft which are arranged in the body, wherein the starting mechanism can drive the output shaft to rotate, the inner end of the output shaft extends out of the body, the output shaft is in sliding connection with the body, a positioning sleeve is axially fixed on the inner end of the output shaft, the inner end of the body is positioned in the positioning sleeve, a positioning structure is arranged between the inner wall of the positioning sleeve and the outer wall of the inner end of the body, and the positioning structure can position the positioning sleeve and the inner end of the body along the axial direction of the output shaft after the output shaft slides. The device has the advantages of wide applicability, capability of being used for various models, good stability and the like.

Description

Hand-operated starter

Technical Field

The invention belongs to the technical field of machinery, and relates to a starter, in particular to a hand-operated starter.

Background

With the continuous development of economy, agricultural machines are becoming more and more widely used, and the power source of the agricultural machines is a diesel engine or a gasoline engine, and the diesel engine or the gasoline engine can be put into operation only by means of an auxiliary starting device, namely a so-called starter, before working.

At present, a relatively common starter on the market is a coil spring type starter, which basically comprises a shell, a rotating shaft and a coil spring, wherein the rotating shaft and the coil spring are all arranged in the shell, the rotating shaft is axially limited in the shell and penetrates through the coil spring, the inner end of the coil spring is connected with the rotating shaft, the outer end of the coil spring is fixed on the shell, one end of the rotating shaft is connected with a starting mechanism, the other end of the rotating shaft is connected with a clutch mechanism, the shell of the starter is fixed on a shell of a diesel engine or a gasoline engine when the starter is used, the clutch mechanism is positioned in a starting cup of the diesel engine or the gasoline engine, a user drives the rotating shaft to rotate through the starting mechanism to enable elasticity of the coil spring to tighten, then the rotating shaft is released through elasticity of the coil spring to drive the rotating shaft to rotate at a high speed, and the clutch mechanism is outwards opened under the high-speed rotation of the rotating shaft to be combined with the starting cup, so that a flywheel rotates at a high speed to realize the starting of the diesel engine or the gasoline engine. However, such a starter is generally problematic in that safety is insufficient because a large impact force is generated at the moment of elastic force release of the coil spring.

In order to solve the problem, a starter with higher safety is appeared on the market while the starting convenience is ensured, the starter comprises an input shaft and an output shaft, a clutch mechanism is connected at one end of the output shaft, a planetary gear is arranged between the other end of the output shaft and one end of the input shaft to increase the speed, when a user rotates the input shaft by utilizing a crank, the output shaft can be driven to rotate at a high speed by the planetary gear to drive a starting cup to rotate, and the speed increase by adopting the planetary gear is safer compared with the spring release of a coil spring, for example, an internal combustion engine hand starter disclosed by application number 2015102162. X, an air-cooled diesel engine starting device disclosed by application number 201620956830.6, a hand starter disclosed by application number 201710038380.1, a mini-tiller and the like.

When the types of the diesel engines or the gasoline engines are different, the mounting heights of the starting cups on the flywheel are different, the positions of the starting cups on each diesel engine or each gasoline engine cannot be changed after leaving the factory, namely, the mounting heights of the starting cups on each diesel engine or each gasoline engine are uniquely determined and cannot be adjusted, meanwhile, in order to ensure the stability of power transmission, the starter directly makes a sun gear on the planetary gear and the output shaft into an integrated structure, which means that the positions of the clutch mechanism after being connected to the output shaft cannot be changed, the situation that the positions of the clutch mechanism are not matched with the mounting heights of the starting cups is likely to occur after the starter is mounted on the diesel engine or the gasoline engine, namely, the problem that the starter cannot be commonly used with the diesel engine or the gasoline engine of different types exists, and the applicability is low, and when the situation is met, a user can only purchase an adaptive starter again for use.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a hand starter, which aims to solve the technical problems of improving the applicability and guaranteeing the use stability.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides a hand starter, includes the body and all sets up actuating mechanism and output shaft in this internal, actuating mechanism can drive output shaft rotation and the inner of output shaft stretches to outside the body, its characterized in that, output shaft and body sliding connection, axial fixity locating sleeve on the inner of output shaft, the inner of body is located the locating sleeve, is equipped with location structure between the inner wall of locating sleeve and the inner tip outer wall of body, after the output shaft slides location structure can be with locating sleeve and the axial looks location of body inner along the output shaft.

The hand-operated starter inputs power through the starting mechanism and drives the output shaft to rotate, and finally the output shaft outputs power to drive the starting cup of the diesel engine or the gasoline engine to rotate. When encountering the hand starter installation back output shaft inner and start cup still have the distance, because output shaft and body sliding connection, consequently the user can outwards draw out a section distance with the output shaft for the body, just so alright make the inner of output shaft and start cup form effective cooperation, that is this hand starter can come with the diesel engine of each model or the starter cup assorted on the petrol engine through the slip of output shaft, can carry out the universalization on the machine of each model, improved the suitability of starter well.

In general, in order to ensure the stability of operation, the output shaft is axially fixed to the body, and such a starter cannot be used in general, but if the output shaft is simply configured to be slidable for general purpose, the output shaft may slide against the subjective intention of the user. This is because, although the whole starter is installed sideways when using, the output shaft will not receive axial effort, but because diesel engine or petrol engine can produce vibrations when working, and the output shaft has stopped rotating and no longer cooperates with the starter cup when diesel engine and petrol engine work, the inner of output shaft is the unsettled state this moment, this vibrations will cause the output shaft to appear violating the slip of user's subjective intention, this can cause the output shaft to carry out the condition of effective cooperation with the starter cup when starting next time, consequently because the consideration of job stabilization is that the output shaft can not set up output shaft and body as sliding connection with the person skilled in the art.

The starter has the advantages that although the applicability is improved by adopting the structure that the output shaft is in sliding connection, the positioning sleeve is axially fixed at the inner end of the output shaft, the inner end of the body is positioned in the positioning sleeve, then the positioning structure is arranged between the positioning sleeve and the inner end of the body, after the output shaft slides, the positioning structure can axially position the positioning sleeve and the inner end of the body along the output shaft, so that the positioning sleeve is positioned, the positioning sleeve is axially fixed on the output shaft, the output shaft is also positioned, that is, the force acted on the output shaft due to the vibration of the diesel engine or the gasoline engine can be counteracted by the action of the positioning structure, the sliding of the output shaft under the action of no external force is prevented, and the reliability and the use stability of the starter are ensured while the applicability is improved.

In the hand-operated starter, the body is internally provided with a positioning cavity, the starting mechanism is arranged in the positioning cavity, the inner end of the body is provided with a convex positioning part, the output shaft is arranged in the positioning part in a penetrating manner, the outer end of the output shaft extends into the positioning cavity, the positioning sleeve is sleeved outside the positioning part, and the positioning structure is arranged between the positioning part and the positioning sleeve.

The output shaft is arranged in the positioning part of the body in a penetrating way, and meanwhile, the outer end of the output shaft extends into the positioning cavity, so that the output shaft can slide relative to the positioning part, namely the body, so that applicability is improved, and meanwhile, the positioning structure can be utilized to prevent the output shaft from sliding when the diesel engine or the gasoline engine works so as to ensure the use stability of the starter.

In the above hand-operated starter, the positioning structure comprises a plurality of positioning convex strips arranged outside the positioning part along the circumferential direction and positioning clamping grooves distributed on the inner side wall of the positioning sleeve along the circumferential direction, each positioning convex strip and/or the positioning sleeve are/is provided with elasticity, the quantity of the positioning convex strips is the same as that of the positioning clamping grooves and corresponds to each other one by one, and each positioning convex strip is clamped into the corresponding positioning clamping groove.

Because the positioning convex strips and/or the positioning sleeves are elastic, after the positioning convex strips are clamped into the corresponding positioning grooves, the positioning convex strips and/or the positioning sleeves are extruded to form radial elastic force, and the elastic force can be utilized to form resistance to the sliding of the output shaft after the output shaft moves, so that the function of preventing the output shaft from shifting during working is achieved, and meanwhile, the output shaft can overcome the elastic force to move when a user applies acting force, so that the usability is improved, and the use stability of the starter is guaranteed.

In the above-mentioned hand starter, as another technical scheme, location structure including setting up the location protruding head on the spacer bush inside wall and two positioning groove that set up on the spacer bush outside wall, two positioning groove set up along the slip direction of output shaft, the location protruding head has elasticity, the surface of location protruding head is the sphere and two positioning groove's shape is the same with the location protruding head, the location protruding head embedding is in one of them positioning groove when the outer terminal surface of spacer bush offsets with the inner terminal surface of organism, when the output shaft removes to spacing portion and offsets with spacing face and lean on in another positioning groove.

When the diesel starter or gasoline starter works, the positioning convex head is positioned in one of the positioning grooves to position the positioning sleeve, so that the positioning sleeve can overcome the action generated by vibration and keep static relative to the positioning part, and the output shaft is prevented from sliding when the diesel starter or gasoline starter works. When the user applies acting force on the output shaft, the positioning convex head can be deformed to deviate from the positioning groove to realize the sliding of the output shaft, so that the usability is improved and the use stability of the starter is ensured.

In the hand-operated starter, the inner end of the output shaft is connected with a clutch mechanism which can be outwards opened when the output shaft rotates, a clamp spring and a retainer ring are arranged on the outer side of the inner end of the output shaft, an annular positioning seat is arranged on the inner bottom wall of the positioning sleeve, the clamp spring is embedded into the annular positioning seat, the inner end face of the clamp spring is abutted against the wall, facing the clamp spring, of the annular positioning seat, the clutch mechanism is abutted against the outer end face of the retainer ring, and the inner end face of the positioning sleeve is abutted against the clutch mechanism.

The clutch mechanism is driven to open when the output shaft rotates and is combined with the starter to realize the starting of the diesel engine or the gasoline engine. The clutch mechanism is arranged on the outer side of the inner end of the output shaft, the clutch mechanism is abutted against the outer end face of the retainer ring, the inner end face of the positioning sleeve is abutted against the clutch mechanism, the inner bottom wall of the positioning sleeve is provided with an annular positioning seat, the inner end face of the retainer ring is abutted against the wall of the annular positioning seat facing the retainer ring, so that the positioning sleeve and the clutch mechanism are axially fixed with the shaft body through the arrangement of the retainer ring and the retainer ring, and then the positioning sleeve and the clutch mechanism move together when the output shaft stretches out, and thus the sliding of the output shaft is prevented when the positioning structure prevents the positioning sleeve from sliding relative to the positioning part, and the starter can improve the applicability and ensure the stability when in use.

In the hand-operated starter, the inner end of the body is provided with a stop surface, the outer end surface of the positioning sleeve is propped against the stop surface, the outer side of the output shaft in the positioning part is provided with a limiting part, the positioning part is internally provided with a limiting surface, and when the output shaft slides in the direction of extending out of the body in opposite directions, the inner end surface of the limiting part can be propped against the limiting surface.

The outer end surface of the positioning sleeve is abutted against the inner end surface of the body, which means that the output shaft cannot move towards the outer end of the body in the state, so that the state can be regarded as the initial position of the output shaft, and the output shaft can slide to the designated height when the output shaft is retracted again after being extended; the limiting part and the limiting surface are arranged mainly for limiting the extending distance of the output shaft, so that the output shaft is prevented from extending excessively to be separated from the starting mechanism, and the stability of use is ensured to a certain extent while the applicability is improved.

In the hand-operated starter, a supporting bearing is arranged between the output shaft and the positioning part, the limiting part is annular, and the limiting surface is the outer end surface of the supporting bearing.

The body is stationary, and the output shaft needs to rotate, and the support bearing is generally arranged between the shaft body and the body to support the output shaft, so that the limiting part is only required to be arranged to be annular, and then the outer end face of the support bearing is directly selected to serve as a limiting surface for use, so that the purpose of dual purposes of one object is achieved, the supporting effect of the output shaft is achieved, and the limitation of the extending distance of the output shaft is also achieved.

In the hand-operated starter, the starting mechanism comprises an input shaft and a planetary gear, the outer end of the input shaft extends out of the body, the speed of the input shaft is increased through the planetary gear between the inner end of the input shaft and the outer end of the output shaft, a guide hole is formed in the inner end face of the input shaft, the outer end of the output shaft extends into the guide hole, and the distance between the inner end face of the limiting part and the limiting face is smaller than the length of the output shaft extending into the guide hole.

The guide hole is arranged on the inner end surface of the input shaft, and the outer end of the output shaft extends into the guide hole, so that the coaxiality between the input shaft and the output shaft can be ensured, and the stability of power transmission is ensured. The distance between the inner end surface of the limiting part and the limiting surface is set to be smaller than the length of the output shaft extending into the guide hole, so that the outer end part of the output shaft still is positioned in the guide hole after the output shaft extends out, and the hand-operated starter can improve the applicability and ensure the stability.

In the above hand-operated starter, the output shaft comprises a shaft body and a sliding part fixedly connected to the outer end part of the shaft body, the sun gear on the planetary gear is in sliding connection with the sliding part and circumferentially fixed, the outer side wall of the sliding part is surrounded by four straight surfaces and an outer convex cambered surface connected between two adjacent straight surfaces, the center of the sun gear on the planetary gear is provided with a connecting hole with the same shape as the sliding part, and each outer convex cambered surface on the outer side wall of the sliding part is propped against the hole wall of the guide hole.

The sliding part outer side wall of the output shaft is surrounded by four straight surfaces and an outer convex cambered surface connected between the two straight surfaces, and the center of a sun gear on the planetary gear is provided with a connecting hole with the same shape as the sliding part, so that when the connecting hole is sleeved on the sliding part, the sliding connection can be formed while the circumferential fixing is formed, and simultaneously, the coaxiality between the input shaft and the output shaft is ensured by propping each outer convex cambered surface outside the sliding part against the hole wall of the guide hole, thereby improving the applicability and simultaneously ensuring the working stability.

In the hand-operated starter, the center of the inner end surface of the input shaft is provided with a concave cavity, a guide bearing is fixed in the concave cavity, and the guide hole is a center hole of the guide bearing.

The output shaft can rotate at a high speed relative to the input shaft after the speed of the planetary gear is increased, namely, the output shaft and the input shaft can rotate relatively, then the situation that the outer end part of the guide hole and/or the output shaft is worn exists, and once the guide hole and/or the outer end part of the output shaft are worn, the coaxiality of the input shaft and the output shaft cannot be guaranteed. Therefore, a concave cavity is machined in the center of the inner end surface of the input shaft, and a guide bearing is fixed in the concave cavity, so that the center hole of the guide bearing is a guide hole, the problem that the guide hole and/or the outer end part of the output shaft are worn possibly caused when the input shaft and the output shaft rotate is solved, the applicability of the starter is improved, and the use stability of the starter is further ensured.

Compared with the prior art, the hand-operated starter has the following advantages:

1. the output shaft is in sliding connection with the sun gear, the shaft body is provided with the positioning sleeve, a positioning structure is arranged between the positioning sleeve and the positioning part, the sliding of the output shaft during working can be prevented by utilizing the positioning structure, and the applicability is improved and the use stability is ensured;

2. the initial position and the sliding-out position of the output shaft are limited by the cooperation of the positioning sleeve and the stop surface and the cooperation of the limiting part and the limiting surface, so that the clutch mechanism can be effectively matched with the starting cup all the time;

3. the output shaft is in sliding connection with the sun gear, a guide hole is formed in the inner end face of the input shaft, the outer end of the output shaft extends into the guide hole, the coaxiality between the input shaft and the output shaft is ensured while the applicability is improved, and the working stability of the starter is ensured;

4. the concave cavity is processed on the inner end surface of the output shaft, the guide bearing is fixed in the concave cavity, the center hole of the guide bearing is used as a guide hole, the problem that the guide hole and/or the outer end part of the output shaft are worn possibly caused when the input shaft and the output shaft rotate is solved, and the stability of the operation of the starter is further ensured while the applicability is improved.

Drawings

Fig. 1 is a schematic diagram of the present hand starter.

Fig. 2 is a cross-sectional view of the present hand starter in accordance with the first embodiment.

Fig. 3 is a cross-sectional view of the hand starter of the first embodiment after extension.

Fig. 4A is an exploded view of the first embodiment between the spacer sleeve and the second end cap.

Fig. 4B is another exploded view of the first embodiment showing the spacer sleeve and the second end cap.

Fig. 5 is a schematic diagram of the connection of the output shaft to the sun gear.

Fig. 6 is a transverse cross-sectional view between the output shaft and the guide bearing.

Fig. 7A is a schematic diagram of the connections between the input shaft, the planetary gears and the output shaft.

Fig. 7B is a schematic view of another angular connection between the input shaft, the planetary gears and the output shaft.

In the figure, 1, a body; 1a, an end cover I; 1a1, a connecting portion; 1b, a second end cover; 1b1, a positioning part; 1b11, positioning convex strips; 1c, positioning the cavity; 2. an input shaft; 2a, a connecting end; 2b, annular projections; 3. an output shaft; 3a, a shaft body; 3a1, a limit part; 3b, a sliding part; 3b1, straight face; 3b2, a convex cambered surface; 4. a planetary gear; 4a, sun gear; 4b, a gear ring; 4c, planet gears; 5. a positioning sleeve; 5a, positioning clamping grooves; 5b, an annular positioning seat; 6. a clutch mechanism; 7. clamping springs; 8. a retainer ring; 9. a stop surface; 10. a limiting surface; 11. a support bearing; 12. a guide hole; 13. a guide bearing; 14. a housing; 15. a fastener; 16. a positioning pin; 17. and a starting mechanism.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1 and 2, a hand-operated starter comprises a housing 14, a body 1, an output shaft 3, a starting mechanism 17 and a clutch mechanism 6, wherein the starting mechanism 17 can drive the output shaft 3 to rotate, and the starting mechanism 17 specifically comprises an input shaft 2 and a planetary gear 4. The body 1 is fixed in the shell 14 through penetrating the shell 14 from outside and penetrating the fastener 15 of the body 1, the input shaft 2 and the output shaft 3 are both arranged in the body 1, the outer end of the input shaft 2 extends out of the outer end of the body 1, the inner end of the output shaft 3 extends out of the inner end of the body 1, and power is transmitted between the inner end of the input shaft 2 and the outer end of the output shaft 3 through the planetary gear 4.

As shown in fig. 2 and 3, the body 1 includes a first end cap 1a and a second end cap 1b, the outer end of the first end cap 1a is provided with a protruding connecting portion 1a1, the connecting portion 1a1 extends out of the outer end of the housing 14, the input shaft 2 is arranged in the connecting portion 1a1 in a penetrating manner, the input shaft 2 can rotate relative to the connecting portion 1a1, the outer end of the input shaft 2 extends out of the outer end of the connecting portion 1a1, and the outer end of the input shaft 2 is a connecting end 2a with a hexagonal cross section. The inner end of the end cover II 1b is provided with a convex positioning part 1b1, the output shaft 3 is arranged in the positioning part 1b1, the output shaft 3 can rotate relative to the positioning part 1b1, the inner end of the output shaft 3 extends out of the inner end of the positioning part 1b1, the clutch mechanism 6 is connected to the inner end part of the output shaft 3, and the clutch mechanism 6 can be driven to open outwards when the output shaft 3 rotates. The inner end of the first end cover 1a is propped against the outer end of the second end cover 1b, a positioning cavity 1c is formed between the first end cover 1a and the second end cover 1b, the planetary gear 4 is arranged in the positioning cavity 1c, the inner end of the input shaft 2 and the outer end of the output shaft 3 extend into the positioning cavity 1c, and the input shaft 2 and the output shaft 3 transmit power through the planetary gear 4.

As shown in fig. 7A and 7B, specifically, the planetary gear 4 includes a gear ring 4B, a sun gear 4a disposed in the center of the inner side of the gear, and a plurality of planetary gears 4c meshed between the gear ring 4B and the sun gear 4a, wherein the gear ring 4B is fixed with the first end cover 1a and the second end cover 1B, the sun gear 4a is circumferentially fixed at the outer end of the output shaft 3, an annular protrusion 2B is disposed on the outer side of the inner end of the input shaft 2, a plurality of positioning pins 16 which are the same as the planetary gears in number and one-to-one are circumferentially connected to the inner end surface of the annular protrusion 2B, each planetary gear 4c is respectively connected to a corresponding positioning pin 16, and when the input shaft 2 rotates, each planetary gear 4c can be driven to rotate around the inner ring and simultaneously drive the sun gear 4a to rotate, so as to drive the output shaft 3 to rotate to drive the clutch mechanism 6 to work.

As shown in fig. 2 and 3, the outer end of the output shaft 3 is slidably connected with the sun gear 4a, a guide hole 12 is provided on the inner end surface of the input shaft 2, the outer end of the output shaft 3 extends into the guide hole 12, and the outer end of the output shaft 3 is always located in the guide hole 12 when the output shaft 3 slides relative to the sun gear 4 a. Specifically, the center of the inner end surface of the input shaft 2 is provided with a concave cavity, a guide bearing 13 is fixed in the concave cavity, and the guide hole 12 is a center hole of the guide bearing 13.

As shown in fig. 5 and 6, the output shaft 3 includes a shaft body 3a and a sliding portion 3b fixedly connected to an outer end portion of the shaft body 3a, a sun gear 4a on the planet gear 4 is connected to the sliding portion 3b, an inner end of the shaft body 3a extends to an outside of an inner end of the positioning portion 1b1, an outer side wall of the sliding portion 3b is surrounded by four straight surfaces 3b1 and an outer protruding cambered surface 3b2 connected between two adjacent straight surfaces 3b1, a connecting hole with the same shape as the sliding portion 3b is formed in a center of the sun gear 4a on the planet gear 4, and each outer protruding cambered surface 3b2 on an outer side wall of the sliding portion 3b abuts against a hole wall of the guide hole 12.

As shown in fig. 2 and 3, a protruding limiting portion 3a1 is provided on the outer side of the shaft body 3a, a limiting surface 10 is provided in the positioning portion 1b1, and when the output shaft 3 slides relative to the sun gear 4a in a direction away from the input shaft 2, the inner end surface of the limiting portion 3a1 can abut against the limiting surface 10. In this embodiment, a support bearing 11 is disposed between the outer side of the shaft body 3a and the inner wall of the positioning portion 1b1, the limiting portion 3a1 is annular, and the limiting surface 10 is an outer end surface of the support bearing 11.

As shown in fig. 2 and 3, a part of the shaft body 3a extending to the outside of the positioning part 1b1 is sleeved with a positioning sleeve 5, the positioning sleeve 5 is axially fixed on the output shaft 3, the positioning part 1b1 is located at the inner side of the positioning sleeve 5, a stop surface 9 is arranged at the inner end of the body 1, in this embodiment, the inner end surface of the end cover two 1b is the stop surface 9, the outer end surface of the positioning sleeve 5 abuts against the stop surface 9, a positioning structure is arranged between the inner wall of the positioning sleeve 5 and the outer wall of the positioning part 1b1, and after the output shaft 3 slides, the positioning structure can position the positioning sleeve 5 and the positioning part 1b1 along the axial direction of the output shaft 3. The part of the shaft body 3a extending to the outside of the positioning part 1b1 is provided with a clamp spring 7, the bottom wall of the inner side of the positioning sleeve 5 is provided with an annular positioning seat 5b, the clamp spring 7 is embedded into the annular positioning seat 5b, and the inner end surface of the clamp spring 7 is abutted against the wall of the annular positioning seat 5b facing the clamp spring 7. The inner end face of the locating sleeve 5 is abutted against the clutch mechanism 6, a retainer ring 8 is arranged at the inner end part of the shaft body 3a, the clutch mechanism 6 is abutted against the outer end face of the retainer ring 8, the locating sleeve 5 and the clutch mechanism 6 are axially fixed with the shaft body 3a through the arrangement of the retainer ring 8 and the retainer ring 7, and then the locating sleeve 5 and the clutch mechanism 6 move together when the output shaft 3 stretches out.

As shown in fig. 4A and 4B, the positioning structure includes a plurality of positioning protruding strips 1B11 circumferentially disposed on the outer side of the positioning portion 1B1 and positioning clamping grooves 5a circumferentially distributed on the inner side wall of the positioning sleeve 5, each positioning protruding strip 1B11 and/or the positioning sleeve 5 has elasticity, the number of the positioning protruding strips 1B11 is the same as and corresponds to that of the positioning clamping grooves 5a one by one, and each positioning protruding strip 1B11 is clamped into the corresponding positioning clamping groove 5 a. In this embodiment, the first end cover 1a, the second end cover 1b and the positioning sleeve 5 are made of rubber materials, wherein the first end cover 1a and the second end cover 1b are made of rubber materials and can absorb the vibration transferred to the starter when the diesel engine or the gasoline engine works, and the second end cover 1b is made of rubber materials and can enable the positioning raised strip 1b11 to have elasticity; the locating sleeve 5 is made of rubber materials, so that the inner wall of the locating clamping groove 5a and the outer wall of the locating raised strip 1b11 can be tightly attached, meanwhile, the friction force between the locating clamping groove 5a and the outer wall of the locating raised strip 1b is increased due to the characteristics of the rubber materials, larger resistance can be formed, in addition, the locating sleeve 5 can play a role in sealing, because the locating sleeve 5 is sleeved outside the shaft body 3a and the locating part 1b1 is located in the locating sleeve 5, impurities such as mud are blocked outside by the locating sleeve 5, and the effect on the operation of the planetary gear 4 caused by the fact that the impurities such as mud enter between the first end cover 1a and the second end cover 1b is avoided.

When installed, the housing 14 of the starter is secured to the casing of the diesel or gasoline engine and ensures that the clutch mechanism 6 is located within the starting cup of the diesel or gasoline engine. The starting mode of the starter is the same as that of a hand starter in the prior art, a user is sleeved on the outer end of the input shaft 2 by a crank, then the input shaft 2 is reversely rocked, then the planetary gear 4 drives the output shaft 3 to reversely shake 1/4 circle to enable the clutch mechanism 6 to be opened outwards and combined with a starting cup, then the input shaft 2 is positively rocked, and the planetary gear 4 drives the output shaft 3 to positively rotate to drive the starting cup to rotate, so that the diesel engine or the gasoline engine is started.

When the housing 14 is fixed on the casing and the clutch mechanism 6 is at a distance from the starting cup as shown in fig. 3, the output shaft 3 is slidably connected with the sun gear 4a of the planetary gear 4 and circumferentially fixed, so that a user can pull the output shaft 3 outwards for a certain distance, the clutch mechanism 6 can extend into the starting cup, and meanwhile, the output shaft 3 and the sun gear 4a are still normally matched to ensure effective power transmission, namely, the hand-operated starter can be matched with the starting cup on a diesel engine or a gasoline engine of various types through the sliding of the output shaft 3, and can be commonly used on machines of various types, so that the applicability of the starter is well improved.

The starter has the advantages that although the applicability is improved by arranging the output shaft 3 and the sun gear 4a in a sliding connection mode, the guide hole 12 is arranged on the inner end face of the input shaft 2, the outer end portion of the output shaft 3 is inserted into the guide hole 12, the length of the output shaft 3 positioned in the guide hole 12 is set to be larger than the sliding distance of the output shaft 3, and therefore the outer end portion of the output shaft 3 is always positioned in the guide hole 12 no matter the output shaft 3 stretches out or retracts, coaxiality between the output shaft 3 and the input shaft 2 is maintained, and accordingly the applicability of the starter is improved, and meanwhile stability of power transmission between the input shaft 2 and the output shaft 3 is guaranteed.

In addition, since the output shaft 3 is slidably connected with the sun gear 4a, although the whole starter is installed laterally, the output shaft 3 is not subjected to axial force, but the diesel engine or the gasoline engine generates vibration when in operation, and the clutch mechanism 6 is already separated from the starting cup when the diesel engine or the gasoline engine is in operation, the situation that the output shaft 3 is retracted under the action of no external force due to the vibration when the diesel engine or the gasoline engine is in operation can occur, which can cause the situation that the clutch mechanism 6 cannot be combined with the starting cup when in next starting. Therefore, the starter is provided with the positioning sleeve 5 on the output shaft 3 and the positioning structure comprising the positioning convex strips 1b11 and the positioning clamping grooves 5a is arranged between the positioning sleeve 5 and the positioning part 1b1, and the positioning convex strips 1b11 and/or the positioning sleeve 5 have elasticity, so that the resistance to the sliding of the output shaft 3 can be formed by utilizing the elasticity after the movement of the output shaft 3, the force acting on the output shaft 3 due to the vibration of the diesel engine or the gasoline engine can be counteracted by the resistance, the sliding of the output shaft 3 under the action of no external force is prevented, and the reliability of the starter is ensured while the applicability is improved.

Example two

The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the positioning structure includes a positioning protruding head disposed on the inner sidewall of the positioning sleeve 5 and two positioning grooves disposed on the outer sidewall of the positioning portion 1b1, the two positioning grooves are disposed along the sliding direction of the output shaft 3, the positioning protruding head has elasticity, the surface of the positioning protruding head is spherical, and the shapes of the two positioning grooves are the same as the positioning protruding head, when the outer end surface of the positioning sleeve 5 abuts against the inner end surface of the end cover two 1b, the positioning protruding head is embedded into one of the positioning grooves, and when the output shaft 3 moves to the position limiting portion 3a1 abuts against the position limiting surface 10, the positioning protruding head is embedded into the other positioning groove.

When the diesel starter or gasoline starter works, the positioning convex head is positioned in one of the positioning grooves to position the positioning sleeve 5, so that the positioning sleeve 5 can overcome the action generated by vibration and keep static relative to the positioning part 1b1, and the output shaft 3 is prevented from sliding when the diesel starter or gasoline starter works. When a user applies a force to the output shaft 3, the positioning convex head can be separated from the positioning groove through the deformation of the positioning convex head so as to realize the sliding of the output shaft 3.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The hand starter comprises a shell (14), a body (1) and a starting mechanism (17) and an output shaft (3) which are all arranged in the body (1), wherein the body (1) is fixed in the shell (14) through a fastener (15) penetrating into the shell (14) from outside and penetrating through the body (1), the starting mechanism (17) can drive the output shaft (3) to rotate, the inner end of the output shaft (3) extends out of the body (1), the hand starter is characterized in that the output shaft (3) is in sliding connection with the body (1), a positioning sleeve (5) is axially fixed on the inner end of the output shaft (3), the inner end of the body (1) is positioned in the positioning sleeve (5), a positioning structure is arranged between the inner wall of the positioning sleeve (5) and the outer wall of the inner end of the body (1), after the output shaft (3) slides, the positioning structure can position the positioning sleeve (5) and the inner end of the body (1) along the axial direction of the output shaft (3), a positioning cavity (1 c) is arranged in the body (1), the starting mechanism (17) is arranged in the positioning cavity (1 c), the inner end of the output shaft (1) protrudes out of the positioning cavity (1) and is provided with a positioning part (1 b) which is arranged in the positioning cavity (1), the locating sleeve (5) is sleeved outside the locating part (1 b 1), the locating structure is arranged between the locating part (1 b 1) and the locating sleeve (5), the locating structure comprises a plurality of locating convex heads (1 b 11) arranged on the outer side of the locating part (1 b 1) along the circumferential direction and locating clamping grooves (5 a) distributed on the inner side wall of the locating sleeve (5) along the circumferential direction, each locating convex head (1 b 11) and/or the locating sleeve (5) are/is provided with elasticity, the quantity of the locating convex heads (1 b 11) is the same as that of the locating clamping grooves (5 a) and corresponds to each locating convex head one by one, each locating convex head (1 b 11) is clamped into the corresponding locating clamping groove (5 a), or the locating structure comprises locating convex heads arranged on the inner side wall of the locating sleeve (5) and two locating grooves arranged on the outer side wall of the locating part (1 b 1), the two locating convex heads are arranged along the sliding direction of the output shaft (3), the locating convex heads are provided with elasticity, the surfaces of the locating convex heads are spherical surfaces, and the two locating convex heads are the same as that the locating convex heads are positioned, when the inner end surfaces of the locating sleeve (5) and the inner end surfaces of the locating convex heads (1) are abutted against one another locating convex heads (3), and the inner end surfaces of the other locating convex heads (1) are embedded into the locating convex heads (3) when the locating convex heads are embedded into the locating convex heads (3).

2. The hand starter according to claim 1, wherein the inner end of the output shaft (3) is connected with a clutch mechanism (6) which can be outwards opened when the output shaft (3) rotates, a clamp spring (7) and a retainer ring (8) are arranged on the outer side of the inner end of the output shaft (3), an annular positioning seat (5 b) is arranged on the inner bottom wall of the positioning sleeve (5), the clamp spring (7) is embedded into the annular positioning seat (5 b), the inner end surface of the clamp spring (7) is abutted against the wall, facing the clamp spring (7), of the annular positioning seat (5 b), the clutch mechanism (6) is abutted against the outer end surface of the retainer ring (8), and the inner end surface of the positioning sleeve (5) is abutted against the clutch mechanism (6).

3. Hand starter according to claim 1 or 2, characterized in that the inner end of the body (1) is provided with a stop surface (9), the outer end surface of the positioning sleeve (5) is abutted against the stop surface (9), the outer side of the output shaft (3) in the positioning part (1 b 1) is provided with a limiting part (3 a 1), the positioning part (1 b 1) is internally provided with a limiting surface (10), and when the output shaft (3) slides towards the direction extending out of the body (1), the inner end surface of the limiting part (3 a 1) can be abutted against the limiting surface (10).

4. A hand starter according to claim 3, wherein a support bearing (11) is provided between the output shaft (3) and the positioning portion (1 b 1), the limiting portion (3 a 1) is annular, and the limiting surface (10) is an outer end surface of the support bearing (11).

5. The hand starter according to claim 4, wherein the starting mechanism (17) comprises an input shaft (2) and a planetary gear (4), the outer end of the input shaft (2) extends out of the body (1), the speed of the input shaft (2) and the outer end of the output shaft (3) is increased through the planetary gear (4), a guide hole (12) is formed in the inner end surface of the input shaft (2), the outer end of the output shaft (3) extends into the guide hole (12), and the distance between the inner end surface of the limiting part (3 a 1) and the limiting surface (10) is smaller than the length of the output shaft (3) extending into the guide hole (12).

6. The hand starter according to claim 5, wherein the output shaft (3) comprises a shaft body (3 a) and a sliding part (3 b) fixedly connected to the outer end part of the shaft body (3 a), a sun gear (4 a) on the planet gear (4) is slidably connected with the sliding part (3 b) and circumferentially fixed, the outer side wall of the sliding part (3 b) is surrounded by four straight surfaces (3 b 1) and an outer convex cambered surface (3 b 2) connected between two adjacent straight surfaces (3 b 1), a connecting hole with the same shape as the sliding part (3 b) is arranged at the center of the sun gear (4 a) on the planet gear (4), and each outer convex cambered surface (3 b 2) on the outer side wall of the sliding part (3 b) is abutted against the wall of the guide hole (12).

7. The hand starter according to claim 5, wherein the center of the inner end surface of the input shaft (2) is provided with a concave cavity, a guide bearing (13) is fixed in the concave cavity, and the guide hole (12) is a center hole of the guide bearing (13).