CN212429069U

CN212429069U - Hand-pulling type starting device

Info

Publication number: CN212429069U
Application number: CN202021204791.7U
Authority: CN
Inventors: 林勇; 何洪伟
Original assignee: Taizhou Kunzheng Technology Co ltd
Current assignee: Taizhou Kunzheng Technology Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-01-29
Anticipated expiration: 2030-06-24

Abstract

The utility model provides a hand-pulling type starting drive belongs to agricultural machinery accessory technical field. The problem that an existing hand-pulling type starting device is unstable in use and poor in reliability is solved. This hand-pulling starting drive includes the shell, the stay cord, be fixed in the dabber in the shell and cup joint at the epaxial start-up dish of dabber, the start-up dish outer peripheral face is equipped with the grooving, stay cord one end is fixed mutually with the start-up dish back and is twined on the start-up dish along the grooving, the stay cord other end stretches out outside the shell, the dabber has still cup jointed spacing cover, spacing cover inboard has and starts a set external shape matched with cavity, the start-up dish is located the cavity, spacing cover lateral part is run through and is provided with the breach of stepping down, the stay cord passes the breach of stepping down, cavity inner wall and start-. This hand-pulling starting drive has stability height, advantage that the reliability is strong.

Description

Hand-pulling type starting device

Technical Field

The utility model belongs to the technical field of the agricultural machinery accessory, a hand power formula starting drive is related to.

Background

With the continuous progress of society, the degree of agricultural mechanization is higher and higher, and agricultural cultivators are more and more commonly used, and the power source of the agricultural cultivator is a gasoline/diesel engine which can be driven by auxiliary starting equipment before working to enter a running state. Common starter has hand starter and hand power starter, and wherein hand power starter has comparatively stable market because its simple structure and cost are lower.

For example, patent application No. 201220545144.1 discloses a hand-pulling starter for diesel engine, which comprises a fixed cover with a recess inside and a starting disk arranged in the recess of the fixed cover, wherein the recess has a central shaft and a coil groove, the starting disk is sleeved on the central shaft, the starting disk can rotate around the central shaft, the coil groove is internally provided with a coil, one end of the coil is fixed on the side wall of the coil groove, the other end of the coil is fixed on the starting disk, the starting disk is provided with an annular groove, a starting rope is arranged in the annular groove, the outer end of the starting rope penetrates out of the edge of the fixed cover, a mounting groove is arranged at the outer end part of the starting disk in a clearance mode, and a starting claw is hinged. When the starting device is operated, the starting rope is pulled to rotate around the central shaft, the coil spring is wound to store force during the rotation, and meanwhile, the starting claw swings around a hinge point to be outwards opened and inserted into a hole corresponding to a starting cup on the diesel engine; when the starting rope is loosened, the starting disc reversely rotates around the central shaft at a high speed under the elastic force released by the coil spring, so that the starting disc can drive the starting cup to rotate at a high speed to start the diesel engine.

In this kind of hand-pulling type starting drive, only rely on the inner wall of fixed lid to carry out some spacings to the stay cord, but the phenomenon of rope skipping or dislocation often appears in the stay cord in the in-service use process, leads to the use of whole device not stable enough, the reliability is relatively poor.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a hand-pulling type starting drive, solved and used unstable and the poor problem of reliability.

The purpose of the utility model can be realized by the following technical proposal:

hand-pulling type starting drive, including shell, stay cord, be fixed in the dabber in the shell and cup joint at the epaxial start-up dish of dabber, the start-up dish outer peripheral face is equipped with the grooving, and stay cord one end is fixed mutually with the start-up dish back and is twined on the start-up dish along the grooving, outside the shell was stretched out to the stay cord other end, its characterized in that, the dabber still cup jointed spacing cover, spacing cover inboard have with start-up dish external shape matched with cavity, the start-up dish is located the cavity, spacing cover lateral part runs through and is provided with the breach of stepping down, the stay cord passes the breach of stepping down, cavity inner wall and start-.

Through cup jointing spacing cover on the dabber, spacing cover inboard has with start-up set external shape matched with cavity, start-up set is located the cavity, cavity inner wall and start-up set form the clearance that is less than the stay cord external diameter between the outer wall, so just can restrict the activity of stay cord in the position department at grooving place completely, thereby eliminated the phenomenon that rope skipping or dislocation appear in the start-up process, improved hand power formula starting drive's stability in use and reliability well.

In foretell hand power formula starting drive, the start-up dish be the cubic that has the tapering, the grooving is spiral groove, stay cord one end is fixed in the less one end department of start-up dish external diameter, the stay cord other end is drawn out from the great one end of start-up dish external diameter after the grooving winding on the start-up dish, the inboard cavity of spacing cover is the toper cavity.

The grooving is spiral groove for the stay cord winding is the circular cone heliciform after starting the dish, makes the user can comparatively easily through the stay cord pulling start-up dish rotation at the initial stage on the one hand, can form automatic acceleration with the help of the grooving at the follow-up pivoted in-process of start-up dish simultaneously, in order to improve diesel engine's ignition success rate. Correspondingly, the cavity on the inner side of the limiting cover is set to be a conical cavity, so that the rope skipping phenomenon between two adjacent circles of pull ropes can be particularly prevented.

In foretell hand power formula starting drive, limit shield including the annular cover body that is the taper and link firmly in the circular lid of the less one end of annular cover body external diameter, the dabber passes circular lid, the great tip of annular cover body external diameter has straight forward ring extension, the ring extension stretches out the great terminal surface of starting disc external diameter and goes out, the breach of stepping down runs through limit shield and ring extension.

In the above hand-pulling type starting device, the smaller end face edge of the outer diameter of the starting disc is provided with an annular protrusion, a volute spiral spring is arranged in the annular protrusion, the side part of the annular protrusion penetrates through the first bayonet, one end of the volute spiral spring is hooked on the side wall of the first bayonet, the circular cover is provided with a convex ring, the side part of the convex ring is provided with a second bayonet, and the other end of the volute spiral spring is hooked on the side wall of the second bayonet.

The convex ring with the second bayonet is arranged on the circular cover, so that the limiting cover can be used as a mounting seat of a volute spiral spring while the rope skipping phenomenon is prevented, and the structure is simplified.

In the above hand-pulling type starting device, the side part of the annular cover body is provided with a plurality of weight reduction grooves along the circumferential direction.

Compared with the prior art, this hand-pulling starting drive is through cup jointing spacing cover on the dabber, forms the clearance that is less than the stay cord external diameter between cavity inner wall and the starting plate outer wall, just so can restrict the activity of stay cord in the position department at grooving place completely to eliminate the phenomenon that rope skipping or dislocation appear in the start-up process, improved hand-pulling starting drive's stability in use and reliability well.

In addition, the limiting cover can be used as an installation seat of the volute spiral spring while preventing the rope skipping phenomenon, and the structure is simplified.

Drawings

Fig. 1 is a sectional view of the hand-pulling type starting device.

Fig. 2 is a schematic view between the limit cover and the starting disc in the hand-pulling type starting device.

Fig. 3 is a schematic diagram of the engagement between the spiral spring and the starting disc in the hand-pulling type starting device.

Fig. 4 is a schematic diagram of the matching between the spiral spring and the limit cover in the hand-pulling type starting device.

Fig. 5 is a schematic diagram of a limiting cover in the hand-pulling type starting device.

In the figure, 1, a housing; 2. pulling a rope; 3. a mandrel; 4. starting a disc; 4a, rope grooves; 4b, an annular bulge; 4b1 and a first bayonet; 4c, a ring cavity; 4d, claw seats; 5. a limiting cover; 5a, an annular cover body; 5a1, abdication gap; 5a2, weight-reducing slots; 5a3, annular extension; 5b, a circular cover; 5b1, convex ring; 5b11 and a second bayonet; 6. a volute spiral spring; 7. starting a claw; 8. a claw disk; 9. a nut; 10. a spring; 11. a handle.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and fig. 2, the hand-pulling type starting device includes a housing 1, a pulling rope 2, a mandrel 3 fixed in the housing 1, and a starting disc 4 sleeved on the mandrel 3, wherein a rope groove 4a is formed on the outer peripheral surface of the starting disc 4, one end of the pulling rope 2 is fixed with the starting disc 4 and then wound on the starting disc 4 along the rope groove 4a, and the other end of the pulling rope 2 extends out of the housing 1 and is connected with a handle 11. The mandrel 3 is further sleeved with a limiting cover 5, the inner side of the limiting cover 5 is provided with a cavity matched with the external shape of the starting disc 4, the starting disc 4 is positioned in the cavity, and a gap smaller than the outer diameter of the pull rope 2 is formed between the inner wall of the cavity and the outer wall of the starting disc 4. The side part of the limit cover 5 is provided with an abdicating notch 5a1 in a penetrating way, and the pull rope 2 passes through the abdicating notch 5a 1.

Through cup jointing spacing cover 5 on dabber 3, spacing cover 5 inboard have with start 4 external shape matched with cavitys of dish, start 4 to be located the cavity, cavity inner wall and start 4 outer walls between form the clearance that is less than 2 external diameters of stay cord, so just can restrict the position department at grooving 4a places with the activity of stay cord 2 completely, thereby the phenomenon of rope skipping or dislocation appears in the start-up process has been eliminated, hand power starting drive's stability in use and reliability have been improved well.

As shown in fig. 1, 2 and 5, the starting disc 4 is tapered, the rope groove 4a is a spiral groove, and the rope groove 4a is wound around the outer circumferential surface of the starting disc 4 by at least three turns. One end of the pull rope 2 is fixed at the end of the starting disc 4 with smaller outer diameter, the other end of the pull rope 2 is wound on the starting disc 4 along the rope groove 4a and then led out from the end of the starting disc 4 with larger outer diameter, and the cavity on the inner side of the limiting cover 5 is a conical cavity. The position-limiting cover 5 comprises a conical annular cover body 5a and a circular cover 5b fixedly connected to the smaller outer diameter end of the annular cover body 5a, the spindle 3 penetrates through the circular cover 5b, the larger outer diameter end of the annular cover body 5a is provided with a straight forward circular extension part 5a3, and the circular extension part 5a3 extends out of the larger outer diameter end of the starting disk 4. A plurality of weight-reducing grooves 5a2 are formed in the side of the annular cover 5a in a circumferential direction. The abdicating notch 5a1 and the lightening slot 5a2 are punched outwards from the inner side of the annular cover body 5 a.

As shown in fig. 3 and 4, further, an end face edge of the small outer diameter of the starting disc 4 has an annular protrusion 4b, a spiral spring 6 is arranged in the annular protrusion 4b, a first bayonet 4b1 is arranged on a side portion of the annular protrusion 4b in a penetrating manner, one end of the spiral spring 6 is hooked on a side wall of the first bayonet 4b1, a protruding ring 5b1 is arranged on the circular cover 5b, the spindle 3 penetrates through the inner side of the protruding ring 5b1, a second bayonet 5b11 is arranged on a side portion of the protruding ring 5b1, and the other end of the spiral spring 6 is hooked on a side wall of the second bayonet 5b 11. The two ends of the spiral spring 6 are hooked on the side wall of the bayonet 4b1 and the side wall of the bayonet 5b11, respectively, and the user pulls the starting disc 4 to rotate while the position-limiting cover 5 is fixed, which means that one end of the spiral spring 6 is fixed, so that the spiral spring 6 is driven to tighten when the starting disc 4 rotates to accumulate the energy required for starting the diesel engine.

As shown in fig. 1, an end surface of the activation plate 4 having a larger outer diameter is provided with an annular cavity 4c, and the activation plate 4 forms a claw seat 4d at the center of the annular cavity 4 c. Claw seat 4d is cylindrical, and the terminal surface symmetric distribution of claw seat 4d has two holding tanks, and it has the ability to carry out wobbling start-up claw 7 for starting up dish 4 to articulate respectively in two holding tanks. The end part of the mandrel 3 is sleeved with a claw disc 8, the end part of a claw seat 4d is positioned on the inner side of the claw disc 8, two arc claw outlets are arranged on the side part of the claw disc 8 in a penetrating manner, and one ends of two starting claws 7 are respectively positioned at the two arc claw outlets. The end part of the mandrel 3 is connected with a nut 9 in a threaded manner, a spring 10 is sleeved on the mandrel 3, and the elastic force of the spring 10 acts on the claw disc 8 and presses the claw disc against the nut 9. The pressing of the claw disk 8 against the nut 9 by means of the spring 10 creates a friction force that prevents the claw disk 8 from rotating, so that when the user pulls the pull cord 2 to rotate the activation disk 4, the claw disk 8 remains stationary, so that the activation claws 7 can open outwards around the hinge point by abutting against the circular arc shaped claw exit side walls.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A hand-pulling type starting device comprises a shell (1), a pull rope (2), a mandrel (3) fixed in the shell (1) and a starting disc (4) sleeved on the mandrel (3), wherein a rope groove (4a) is formed in the peripheral surface of the starting disc (4), one end of the pull rope (2) is fixed with the starting disc (4) and then wound on the starting disc (4) along the rope groove (4a), the other end of the pull rope (2) extends out of the shell (1), the automatic starting device is characterized in that the mandrel (3) is further sleeved with a limiting cover (5), the inner side of the limiting cover (5) is provided with a cavity matched with the external shape of the starting disc (4), the starting disc (4) is positioned in the cavity, the side part of the limiting cover (5) is provided with a yielding notch (5a1) in a penetrating mode, the pull rope (2) penetrates through the yielding notch (5a1), and a gap smaller than the outer diameter of the pull rope (2) is formed between the inner wall of the cavity and the outer wall of the starting disc (4).

2. A hand-pulling type starting device according to claim 1, wherein the starting disc (4) is in a tapered block shape, the rope groove (4a) is a spiral groove, one end of the pull rope (2) is fixed at the end with the smaller outer diameter of the starting disc (4), the other end of the pull rope (2) is led out from the end with the larger outer diameter of the starting disc (4) after being wound on the starting disc (4) along the rope groove (4a), and the cavity inside the limiting cover (5) is a tapered cavity.

3. A hand-pulled starting device according to claim 2, wherein the stop cap (5) comprises a conical annular cap body (5a) and a circular cap (5b) attached to the end of the annular cap body (5a) with the smaller outer diameter, the spindle (3) passes through the circular cap (5b), the end of the annular cap body (5a) with the larger outer diameter has a straight forward circular extension portion (5a3), the circular extension portion (5a3) extends out of the end of the starting disk (4) with the larger outer diameter, and the relief notch (5a1) passes through the stop cap (5) and the circular extension portion (5a 3).

4. A hand-pulling type starting device as in claim 3, wherein the smaller outer diameter end surface of the starting disk (4) has an annular protrusion (4b), a spiral spring (6) is arranged in the annular protrusion (4b), a first bayonet (4b1) is arranged on the side of the annular protrusion (4b) in a penetrating manner, one end of the spiral spring (6) is hooked on the side wall of the first bayonet (4b1), a protruding ring (5b1) is arranged on the circular cover (5b), a second bayonet (5b11) is arranged on the side of the protruding ring (5b1), and the other end of the spiral spring (6) is hooked on the side wall of the second bayonet (5b 11).

5. A hand-pulled starting device according to claim 3, wherein a plurality of weight-reducing grooves (5a2) are arranged on the side of the annular cover body (5a) in a circumferential direction in a penetrating manner.