CN217056183U

CN217056183U - Three-speed transmission on rotary-cutter mower

Info

Publication number: CN217056183U
Application number: CN202221067184.XU
Authority: CN
Inventors: 沈才武; 李军; 赵晓英; 韩江雨
Original assignee: Huai'an Zhonglu Garden Machinery Co ltd
Current assignee: Huai'an Zhonglu Garden Machinery Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-07-26
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses a three-speed transmission on a rotary-cutter mower, which comprises an input mechanism, a speed change mechanism, a clutch mechanism and an output mechanism, wherein the speed change mechanism is used for receiving the power of the input mechanism and transmitting the power to the clutch mechanism, the output mechanism is in transmission connection with the clutch mechanism, the speed change mechanism comprises a second transmission shaft and a speed change gear set which is movably sleeved on the second transmission shaft, the speed change gear set comprises a first speed change gear, a second speed change gear and a third speed change gear, and three-stage speed change is formed in the practical use; one end of the second transmission shaft is fixedly provided with a first transmission gear; through the regulation pole, flexure strip and the spout of design, can realize carrying out the effect of switching to a plurality of change gear, simple structure, design benefit to whole comparatively compact, very big reduction manufacturing cost and the manufacturing degree of difficulty, simultaneously because mechanical structure is simple, the probability that in use broke down also can reduce, perfect not enough in the current structure.

Description

Three-speed transmission on rotary-cutter mower

Technical Field

The utility model belongs to the technical field of the rotary-knife lawn mower, concretely relates to three-speed transmission on rotary-knife lawn mower.

Background

The rotary-knife mower is also called a weeder, a grass mower, a lawn trimmer and the like, is a mechanical tool for trimming lawns, vegetations and the like, and the transmission is a core structure for changing the advancing speed of the rotary-knife mower.

The existing three-speed transmission adopts a complicated structure in the adjustment of the speed changing gear, has the problems of high production cost, high difficulty and higher probability of failure in later use, thereby having great limitation in actual use and having a space capable of being improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-speed gearbox on rotary knife lawn mower to the current structure of switching a plurality of change gear that provides in solving above-mentioned background art is comparatively complicated, has the problem that the cost is great, the preparation degree of difficulty is big and the fault rate is high.

In order to achieve the above purpose, the utility model provides a following technical scheme: a three-speed transmission on a rotary-cutter mower comprises an input mechanism, a speed change mechanism, a clutch mechanism and an output mechanism, wherein the speed change mechanism is used for receiving power of the input mechanism and transmitting the power to the clutch mechanism; one end of the second transmission shaft is fixedly provided with a first transmission gear, the other end of the second transmission shaft is movably sleeved with an adjusting sliding sleeve, a second shifting rod groove is formed in the surface of the adjusting sliding sleeve, a shifting rod is inserted into the inner side of the second shifting rod groove and used for achieving a speed change function, limiting clamping grooves are formed in the inner walls of the first shifting gear, the second shifting gear and the third shifting gear at equal angles, a sliding groove is further formed in the surface of the second transmission shaft, an adjusting rod is placed in the sliding groove, one end of the adjusting rod is connected with the inner portion of the adjusting sliding sleeve in a clamping mode, the other end of the adjusting rod is protruding and clamped with the limiting clamping grooves in a limiting mode, the position of the shifting gear can be limited, synchronous rotation of the shifting gear and the second transmission shaft is guaranteed, an elastic sheet is further arranged at the bottom of the adjusting rod, and the middle of the elastic sheet abuts against the inner wall of the sliding groove; a separating ring is arranged among the first speed change gear, the second speed change gear and the third speed change gear, and the separating ring is abutted and attached to a bulge at the other end of the adjusting rod; the clutch mechanism comprises an output gear set, the output gear set is composed of a first output gear, a second output gear and a third output gear, the first speed change gear is meshed with the first output gear, the second speed change gear is meshed with the second output gear, and the third speed change gear is meshed with the third output gear.

Preferably, clutching mechanism is still including setting up the spacing sliding sleeve in output gear group one side, first puddler groove has been seted up on the surface of spacing sliding sleeve, the driving lever has been inserted equally in the inside of first puddler groove for realize separation and reunion and normal power transmission, spacing sliding sleeve is formed with the rule arch towards output gear group's direction terminal surface the three lateral surfaces of output gear are fixed with the spacing latch with the protruding block of rule on the spacing sliding sleeve the tip of spacing sliding sleeve still is fixed with a spline section of thick bamboo for the block is connected, realizes power transmission, the internal spline with spline section of thick bamboo block is seted up to output gear one, output gear two, output gear three's inner wall, output gear includes the output shaft, the equal movable sleeve of output gear group and spacing sliding sleeve is established on the output shaft.

Preferably, a horizontal groove is formed in the output shaft, a protrusion clamped into the horizontal groove is fixed on the inner wall of the limiting sliding sleeve, the limiting sliding sleeve is limited in the movement direction, normal transmission of power is not affected, and the inner diameters of the first output gear, the second output gear and the third output gear are larger than the outer diameter of the output shaft.

Preferably, the input mechanism comprises an input shaft, a bevel gear is fixed at the end of the input shaft, the input mechanism further comprises a first transmission shaft, a second transmission gear is fixed at one end of the first transmission shaft, the second transmission gear is in meshing transmission with the first transmission gear to realize first-stage transmission of early-stage power, a fixed gear is fixed at the other end of the first transmission shaft, and the bevel gear is in meshing transmission with the fixed gear.

Preferably, the flexure strip is the arc structure, and the both ends of flexure strip are connected with the both ends of adjusting the pole, and one end is connected for the laminating, and the other end is connected for the block, makes things convenient for equipment and dismantlement, and the middle part of flexure strip is towards the bottom inner wall uplift of spout to support with the spout and press the laminating.

Preferably, the surface of the second transmission shaft is provided with a ring groove, a clamp spring is clamped in the ring groove and used for limiting, and the clamp spring is in limiting fit with the separating ring on the outermost side.

Compared with the prior art, the beneficial effects of the utility model are that:

through the regulation pole, flexure strip and the spout of design, can realize carrying out the effect of switching to a plurality of change gear, simple structure, design benefit to whole comparatively compact, very big reduction manufacturing cost and the manufacturing degree of difficulty, simultaneously because mechanical structure is simple, the probability that in use broke down also can reduce, perfect not enough in the current structure.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a connection front view of the present invention;

fig. 3 is a sectional view of the transmission mechanism of the present invention;

fig. 4 is a front view of the clutch mechanism of the present invention;

fig. 5 is a schematic structural view of a first speed change gear of the present invention;

fig. 6 is a schematic structural view of the second transmission shaft of the present invention.

In the figure: 1. an input shaft; 2. a bevel gear; 3. fixing a gear; 4. a first transmission shaft; 5. adjusting the sliding sleeve; 6. a first toggle rod groove; 7. a limiting sliding sleeve; 8. an output gear set; 81. a first output gear; 82. a second output gear; 83. an output gear III; 9. a speed change gear set; 91. a first speed change gear; 92. a second speed change gear; 93. a third speed change gear; 10. a first transmission gear; 11. an output shaft; 12. a second transmission gear; 13. a second drive shaft; 14. a second deflector rod groove; 15. a spline cylinder; 16. limiting latch teeth; 17. a limiting clamping groove; 18. a spacer ring; 19. adjusting a rod; 20. a chute; 21. an elastic sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a technical solution: a three-speed transmission on a rotary-cutter mower comprises an input mechanism, a speed change mechanism, a clutch mechanism and an output mechanism, wherein the speed change mechanism is used for receiving power of the input mechanism and transmitting the power to the clutch mechanism, the output mechanism is in transmission connection with the clutch mechanism, the speed change mechanism comprises a second transmission shaft 13 and a speed change gear set 9 movably sleeved on the second transmission shaft 13, and the speed change gear set 9 consists of a first speed change gear 91, a second speed change gear 92 and a third speed change gear 93; one end of the second transmission shaft 13 is fixed with a first transmission gear 10, the other end is movably sleeved with an adjusting sliding sleeve 5, a second deflector rod groove 14 is formed on the surface of the adjusting sliding sleeve 5, a deflector rod is inserted into the inner side of the second deflector rod groove 14, a limiting clamping groove 17 is formed on the inner wall of a first speed change gear 91, a second speed change gear 92 and a third speed change gear 93 at equal angles, a sliding groove 20 is further formed on the surface of the second transmission shaft 13, an adjusting rod 19 is placed inside the sliding groove 20, one end of the adjusting rod 19 is clamped and connected with the inner part of the adjusting sliding sleeve 5, the other end of the adjusting rod is in a convex shape and is in limiting clamping with the limiting clamping groove 17, an elastic sheet 21 is further arranged at the bottom of the adjusting rod 19, and the elastic sheet 21 and the sliding groove 20 are designed, the function of switching a plurality of speed change gears can be realized, the structure is simple, the design is ingenious, the whole is compact, the production cost and the manufacturing difficulty are greatly reduced, meanwhile, as the mechanical structure is simple, the failure probability is reduced in use, and the defects in the existing structure are overcome, the elastic sheet 21 is of an arc-shaped structure, two ends of the elastic sheet 21 are connected with two ends of the adjusting rod 19, and the middle part of the elastic sheet 21 protrudes towards the inner wall of the bottom of the sliding groove 20 and is pressed and attached to the sliding groove 20; a separating ring 18 is arranged among the first speed change gear 91, the second speed change gear 92 and the third speed change gear 93, the separating ring 18 is abutted against and attached to a protrusion at the other end of the adjusting rod 19, a ring groove is formed in the surface of the second transmission shaft 13, a clamp spring is clamped in the ring groove and is in limit attachment with the separating ring 18 on the outermost side, the separating ring 18 and the speed change gear set 9 are limited, and falling is avoided; the clutch mechanism comprises an output gear set 8, the output gear set 8 is composed of a first output gear 81, a second output gear 82 and a third output gear 83, a first change gear 91 is meshed with the first output gear 81, a second change gear 92 is meshed with the second output gear 82, and a third change gear 93 is meshed with the third output gear 83.

In the embodiment, preferably, the clutch mechanism further includes a limiting sliding sleeve 7 disposed on one side of the output gear set 8, a first shifter rod groove 6 is disposed on a surface of the limiting sliding sleeve 7, a shifter rod is also inserted into the first shifter rod groove 6 for driving the limiting sliding sleeve 7 to move, a regular protrusion is formed on an end face of the limiting sliding sleeve 7 facing the output gear set 8, a limiting latch 16 engaged with the regular protrusion on the limiting sliding sleeve 7 is fixed on an outer side face of the output gear three 83, a spline cylinder 15 is further fixed on an end portion of the limiting sliding sleeve 7, an internal spline engaged with the spline cylinder 15 is disposed on an inner wall of the output gear one 81, an output gear two 82, and the output gear three 83, the output mechanism includes an output shaft 11, the output gear set 8 and the limiting sliding sleeve 7 are movably sleeved on the output shaft 11, a horizontal groove is disposed on the output shaft 11, a protrusion clamped into the horizontal groove is fixed on an inner wall of the limiting sliding sleeve 7, the movement direction of the limiting sliding sleeve 7 is limited, so that the limiting sliding sleeve 7 cannot rotate on the output shaft 11 and can only move in the horizontal direction, and the inner diameters of the first output gear 81, the second output gear 82 and the third output gear 83 are larger than the outer diameter of the output shaft 11.

In this embodiment, preferably, the input mechanism includes an input shaft 1, a bevel gear 2 is fixed at an end of the input shaft 1, the input mechanism further includes a first transmission shaft 4, a second transmission gear 12 is fixed at one end of the first transmission shaft 4, the second transmission gear 12 is in meshing transmission with the first transmission gear 10 to realize power transmission, a fixed gear 3 is fixed at the other end of the first transmission shaft 4, and the bevel gear 2 is in meshing transmission with the fixed gear 3.

The utility model discloses a theory of operation and use flow: when the utility model is used, the input shaft 1 receives external power and transmits the power to the fixed gear 3 through the meshing of the bevel gear 2, at the moment, the fixed gear 3 drives the first transmission shaft 4 and the transmission gear two 12 on the first transmission shaft 4 to transmit together, the transmission gear two 12 drives the second transmission shaft 13 to rotate through meshing connection with the transmission gear one 10, at the moment, the speed change operation is realized on the speed change mechanism according to the actual speed change requirement of the operation, during the speed change, the external deflector rod is inserted into the inner part of the deflector rod groove two 14 and drives the adjusting sliding sleeve 5 to do transverse motion on the second transmission shaft 13, when the adjusting sliding sleeve 5 moves, the adjusting sliding sleeve 5 drives one end of the adjusting rod 19 to move in the sliding groove 20, and the other end of the adjusting rod 19 moves to be clamped into the limiting clamping groove 17 arranged on the inner wall of the first change gear 91 or the second change gear 92 or the third change gear 93, therefore, the first speed change gear 91 or the second speed change gear 92 or the third speed change gear 93 limited by the other end of the adjusting rod 19 is changed into fixed connection from the original movable connection, so that the first speed change gear 91 or the second speed change gear 92 or the third speed change gear 93 limited by the other end of the adjusting rod 19 can be driven by the second transmission shaft 13, when the adjusting rod 19 is switched between the first speed change gear 91 or the second speed change gear 92 or the third speed change gear 93, the adjusting rod 19 can be blocked by the separating ring 18, the other end of the adjusting rod 19 moves towards the bottom of the sliding groove 20, the elastic sheet 21 compresses, the other end of the adjusting rod 19 is bounced under the rebound of the elastic sheet 21, the clamping with the first speed change gear 91 or the second speed change gear 92 or the third speed change gear 93 is ensured, and when the first speed change gear 91 or the second speed change gear 92 or the third speed change gear 93 limited by the other end of the adjusting rod 19 follows the second speed change gear 13 When the output gear is rotated, the first change gear 91, the second change gear 92 or the third change gear 93 respectively drives the first output gear 81, the second output gear 82 and the second output gear 82 to be in meshing transmission, meanwhile, the external deflector rod is inserted into the first deflector rod groove 6, and the first deflector rod groove 6 drives the limiting sliding sleeve 7 to move towards the limiting latch 16 until the limiting sliding sleeve 7 is clamped with the limiting latch 16, the spline cylinder 15 at the end part of the limiting sliding sleeve 7 is clamped and limited with the internal splines on the first output gear 81, the second output gear 82 and the second output gear 82, at the moment, when the first change gear 91 is limited by the adjusting rod 19, the first output gear 81 can be driven to transmit, the first output gear 81 drives the output shaft 11 to rotate, power output is realized, and similarly, when the second change gear 92 is limited by the adjusting rod 19, the second output gear 82 can be driven to transmit, the second output gear 82 drives the output shaft 11 to rotate, realizing power output; when the third speed change gear 93 is limited by the adjusting rod 19, the third output gear 83 can be driven to transmit, the third output gear 83 drives the output shaft 11 to rotate, power output is achieved, when the rotation is stopped temporarily, the limiting sliding sleeve 7 is back to the output gear set 8 through the shifting rod, and the output gear set 8 is in an idle state.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a three-speed transmission on rotary-knife lawn mower, includes input mechanism, speed change mechanism, clutching mechanism and output mechanism, and wherein speed change mechanism is used for receiving input mechanism's power to transmit power to clutching mechanism, output mechanism and clutching mechanism transmission are connected its characterized in that: the speed change mechanism comprises a second transmission shaft (13) and a speed change gear set (9) movably sleeved on the second transmission shaft (13), and the speed change gear set (9) consists of a first speed change gear (91), a second speed change gear (92) and a third speed change gear (93); one end of the second transmission shaft (13) is fixed with a first transmission gear (10), while the other end is movably sleeved with an adjusting sliding sleeve (5), a deflector rod groove II (14) is formed on the surface of the adjusting sliding sleeve (5), a deflector rod is inserted into the inner side of the deflector rod groove II (14), the inner walls of the first speed change gear (91), the second speed change gear (92) and the third speed change gear (93) are equiangularly provided with limit clamping grooves (17), the surface of the second transmission shaft (13) is also provided with a sliding groove (20), an adjusting rod (19) is arranged in the sliding groove (20), one end of the adjusting rod (19) is connected with the inner part of the adjusting sliding sleeve (5) in a clamping way, the other end of the adjusting rod is convex and is in limit clamping with the limit clamping groove (17), an elastic sheet (21) is further arranged at the bottom of the adjusting rod (19), and the middle part of the elastic sheet (21) is abutted against the inner wall of the sliding groove (20); a separating ring (18) is arranged among the first speed change gear (91), the second speed change gear (92) and the third speed change gear (93), and the separating ring (18) is abutted against and attached to a bulge at the other end of the adjusting rod (19); the clutch mechanism comprises an output gear set (8), the output gear set (8) is composed of a first output gear (81), a second output gear (82) and a third output gear (83), a first speed change gear (91) is meshed with the first output gear (81), a second speed change gear (92) is meshed with the second output gear (82), and a third speed change gear (93) is meshed with the third output gear (83).

2. The three-speed transmission on a rotary-knife lawn mower of claim 1, wherein: the clutch mechanism also comprises a limit sliding sleeve (7) arranged on one side of the output gear set (8), a first deflector rod groove (6) is formed in the surface of the limiting sliding sleeve (7), a deflector rod is also inserted into the first deflector rod groove (6), the end surface of the limiting sliding sleeve (7) facing to the direction of the output gear set (8) is provided with regular bulges, a limit latch (16) which is clamped with the regular bulge on the limit sliding sleeve (7) is fixed on the outer side surface of the output gear III (83), a spline cylinder (15) is fixed at the end part of the limiting sliding sleeve (7), internal splines clamped with the spline cylinder (15) are arranged on the inner walls of the first output gear (81), the second output gear (82) and the third output gear (83), the output mechanism comprises an output shaft (11), and the output gear set (8) and the limiting sliding sleeve (7) are movably sleeved on the output shaft (11).

3. The three-speed transmission on a rotary-knife lawn mower of claim 2, wherein: the output shaft (11) is provided with a horizontal groove, the inner wall of the limiting sliding sleeve (7) is fixed with a protrusion clamped into the horizontal groove, and the inner diameters of the first output gear (81), the second output gear (82) and the third output gear (83) are larger than the outer diameter of the output shaft (11).

4. The three-speed transmission on a rotary-knife lawn mower of claim 1, wherein: the input mechanism comprises an input shaft (1), a bevel gear (2) is fixed at the end of the input shaft (1), the input mechanism further comprises a first transmission shaft (4), a second transmission gear (12) is fixed at one end of the first transmission shaft (4), the second transmission gear (12) is in meshing transmission with a first transmission gear (10), a fixed gear (3) is fixed at the other end of the first transmission shaft (4), and the bevel gear (2) is in meshing transmission with the fixed gear (3).

5. The three-speed transmission on a rotary-knife lawn mower of claim 1, wherein: the elastic piece (21) is of an arc-shaped structure, two ends of the elastic piece (21) are connected with two ends of the adjusting rod (19), and the middle of the elastic piece (21) protrudes towards the inner wall of the bottom of the sliding groove (20) and is abutted against and attached to the sliding groove (20).

6. The three-speed transmission on a rotary-knife lawn mower of claim 1, wherein: an annular groove is formed in the surface of the second transmission shaft (13), a clamp spring is clamped in the annular groove, and the clamp spring is in limit fit with the separating ring (18) on the outermost side.