Motor assembly facilitating rapid installation of external transmission shaft

Abstract

The invention relates to the technical field of motor design, and discloses a motor assembly facilitating quick installation of an external transmission shaft, which comprises a motor main body and a transmission shaft positioned at the output end of the motor main body, the outer side of the transmission shaft is rotatably connected with a shaft pipe, and the output end of the motor main body is provided with a butt joint pipe for embedding one end of the shaft pipe; a transmission piece used for connecting the output shaft of the motor body with the end of the transmission shaft is arranged in the butt joint pipe, and a connecting piece used for detachably connecting the end of the shaft pipe into the butt joint pipe is arranged on the butt joint pipe. The end portion of the shaft tube is detachably connected in the butt joint tube through the connecting piece, at the moment, detachable connection of the shaft tube in the butt joint tube can be achieved, the transmission shaft can be conveniently disassembled and assembled by pulling and inserting the end portion of the shaft tube in the butt joint tube, and therefore the tool bit assembly where the transmission shaft is located can be conveniently replaced. The cutter heads in different forms are used for being matched with diversified lawn trimming.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor design, and particularly relates to a motor assembly facilitating the quick installation of an externally connected transmission shaft. Background Art

[0002] A grass trimmer is a handheld tool used to cut weeds in places such as lawns, gardens, and pastures. It can be classified into gasoline-powered and electric-powered types according to the power source.

[0003] Currently, a Chinese patent with the publication number CN221863624U and the publication date of October 22, 2024, discloses a transmission assembly and a grass trimmer. The transmission assembly includes a motor main body and a rotating shaft assembly connected to the motor main body. The rotating shaft assembly includes a connection end for connecting to an external structure. The transmission assembly further includes a transmission member inserted and matched with the connection end. The interior of the transmission member is provided with a first positioning portion and a second positioning portion, and the connection end is correspondingly provided with a first connection portion and a second connection portion. After the connection end is inserted into the transmission member, the first connection portion cooperates with the first positioning portion, and the second connection portion cooperates with the second positioning portion, so that the connection end and the transmission member are fixedly connected.

[0004] The motor of this kind of transmission assembly and grass trimmer uses the transmission member and the rotating shaft assembly to dock the cutter head. However, the replacement of the cutter head of this kind of transmission assembly and grass trimmer is very troublesome, so that it is impossible to quickly replace the cutter head to match the diversified lawn trimming, and ultimately it is not conducive to the matching use of different cutter heads. Summary of the Invention

[0005] The purpose of the present invention is to provide a motor assembly facilitating the quick installation of an externally connected transmission shaft, which can facilitate the disassembly and assembly of the transmission shaft.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A motor assembly facilitating the quick installation of an externally connected transmission shaft includes a motor main body and a transmission shaft located at the output end of the motor main body. A shaft tube is rotatably connected to the outside of the transmission shaft. A docking tube for one end of the shaft tube to be embedded is provided at the output end of the motor main body. A transmission member for connecting the output shaft of the motor main body and the end of the transmission shaft is provided in the docking tube. A connecting member for detachably connecting the end of the shaft tube in the docking tube is provided on the docking tube.

[0007] The present invention is further provided as follows: The transmission member includes a driving gear provided on the output shaft of the motor main body, a spline sleeve rotatably connected in the docking tube and extending to the upper side of the driving gear at one end, a driven gear key-connected to the end of the spline sleeve and meshing with the driving gear, and a spline shaft provided at one end of the transmission shaft and for inserting into the spline sleeve.

[0008] A further setting of the present invention is that: a long slot parallel to the extending direction of the docking pipe is opened at the side of the end of the docking pipe away from the motor main body. A first connecting plate is arranged at one side of the end of the docking pipe and located in the long slot. A second connecting plate is arranged at the other side of the end of the docking pipe and located in the long slot. A first through hole is opened on the first connecting plate. A second through hole is opened on the second connecting plate. A nut groove is opened at the end of the second through hole. A connecting nut is embedded in the nut groove. A threaded shaft is arranged at the end of the docking pipe and passes through the first through hole and the second through hole and is threadedly connected in the connecting nut. A knob is further arranged at the end of the threaded shaft away from the connecting nut.

[0009] A further setting of the present invention is that: the connecting piece includes a swing arm arranged on the upper side of the docking pipe, swing shafts arranged at both sides in the middle of the swing arm, connecting ears arranged on the upper side of the docking pipe and located at the positions of the swing shafts, shaft grooves opened on the connecting ears for the swing shafts to be embedded, a pressing block arranged at one end of the swing arm, a return spring with one end abutted against the lower side of the pressing block and the other end abutted against the upper side of the docking pipe, a positioning hook arranged at the end of the swing arm away from the pressing block, a first hook hole opened on the docking pipe for the positioning hook to pass through, and a second hook hole opened on the shaft pipe for the positioning hook to pass through.

[0010] A further setting of the present invention is that: a positioning table penetrating into the return spring is arranged on the upper side of the docking pipe.

[0011] In summary, the present invention has the following beneficial effects:

[0012] 1. First, one end of the shaft pipe on the transmission shaft is embedded in the docking pipe, and the end of the transmission shaft can enter the docking pipe together with the shaft pipe. Subsequently, the output shaft of the motor main body is connected to the end of the transmission shaft by using the transmission part, so as to realize the motor main body driving the transmission shaft to rotate. Among them, the end of the shaft pipe is detachably connected in the docking pipe by using the connecting part. At this time, the detachable connection of the shaft pipe in the docking pipe can be realized. By inserting and pulling out the end of the shaft pipe in the docking pipe, the transmission shaft can be conveniently disassembled and assembled, so as to conveniently replace the cutter head assembly where the transmission shaft is located, so as to cooperate with different forms of cutter heads for diversified lawn trimming;

[0013] 2. When the shaft pipe is inserted into the docking pipe, the spline shaft at the end of the transmission shaft can be embedded in the spline sleeve. After the motor main body is started, the motor main body can drive the driving gear to rotate, the driving gear can drive the spline sleeve to rotate through the driven gear, and finally the transmission shaft can be driven to rotate;

[0014] 3. When the end of the shaft tube is embedded in the docking tube, rotate the threaded shaft through the knob. Since the connecting nut is embedded in the nut groove, at this time, the first connecting plate and the second connecting plate can be offset toward the side close to each other. Finally, the docking tube can be made to shrink the mouth at one end of the long slot and then hold the end of the second connecting tube tightly, which is beneficial to the stable insertion of the end of the shaft tube in the docking tube;

[0015] 4. When the end of the shaft tube needs to be embedded in the docking tube, first press down the pressing block, so that the return spring is compressed and the positioning hook swings upward. Then the shaft tube can be smoothly embedded in the docking tube. Then release the pressing block. At this time, under the action of the elastic restoring force of the return spring, the positioning hook can pass through the first hook hole and then penetrate into the second hook hole. At this time, the end of the shaft tube in the docking tube can be positioned by the positioning hook; and when the shaft tube needs to be disassembled, only need to press down the pressing block again so that the positioning hook disengages from the first hook hole and the second hook hole, and the shaft tube in the docking tube can be pulled out; finally, the detachable connection of the shaft tube in the docking tube can be realized;

[0016] 5. The docking tube penetrates into the return spring by using the positioning platform, so as to position the position of the return spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0018] Figure 1 is the structural explosion diagram of the present invention;

[0019] Figure 2 is the partial enlarged view of the connection relationship between the motor main body, the transmission shaft and the transmission member in the present invention;

[0020] Figure 3 is the partial explosion diagram of the connection relationship between the docking tube and the threaded shaft in the present invention;

[0021] Figure 4 is the partial cross-sectional view of the connection relationship between the motor main body, the docking tube and the connecting member in the present invention;

[0022] Figure 5 is the structural schematic diagram of the present invention when combined with various tool head assemblies.

[0023] In the figure, 1 is the motor main body; 2 is the transmission shaft; 21 is the shaft tube; 3 is the docking tube; 31 is the long slot; 32 is the first connecting plate; 321 is the first through hole; 33 is the second connecting plate; 331 is the second through hole; 332 is the nut groove; 333 is the connecting nut; 34 is the threaded shaft; 341 is the knob; 35 is the positioning table; 4 is the transmission part; 41 is the driving gear; 42 is the spline sleeve; 43 is the driven gear; 44 is the spline shaft; 5 is the connecting part; 51 is the swing arm; 52 is the swing shaft; 53 is the connecting ear; 54 is the shaft groove; 55 is the pressing block; 56 is the return spring; 57 is the positioning hook; 58 is the first hook hole; 59 is the second hook hole. Detailed implementation mode

[0024] The technical solutions in the embodiments will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] A motor assembly facilitating the quick installation of an externally connected transmission shaft, referring to Figure 1 、 Figure 2 This motor assembly facilitating the quick installation of an externally connected transmission shaft includes a motor main body 1 and a transmission shaft 2 located at the output end of the motor main body 1. The outer side of the transmission shaft 2 is rotatably connected with a shaft tube 21 through a bearing, and a docking tube 3 for one end of the shaft tube 21 to be embedded is fixed on the output end of the motor main body 1 by bolts. At the same time, a transmission part 4 for connecting the output shaft of the motor main body 1 and the end of the transmission shaft 2 is arranged in the docking tube 3. The transmission part 4 includes a driving gear 41, a spline sleeve 42, a driven gear 43, and a spline shaft 44. The driving gear 41 is key-connected to the output shaft of the motor main body 1, the spline sleeve 42 is rotatably connected in the docking tube 3 through a bearing and one end extends to the upper side of the driving gear 41, the driven gear 43 is key-connected to the end of the spline sleeve 42 and meshes with the driving gear 41, and the spline shaft 44 is integrally arranged at one end of the transmission shaft 2 and is used for being inserted into the spline sleeve 42.

[0026] Referring to Figure 1 、 Figure 3, a long strip groove 31 with an extending direction parallel to the extending direction of the docking pipe 3 is also formed on the side of one end of the docking pipe 3 away from the motor main body 1. A first connecting plate 32 is integrally provided on one side of the end of the docking pipe 3 and located in the long strip groove 31. A second connecting plate 33 is integrally provided on the other side of the end of the docking pipe 3 and located in the long strip groove 31. A first through hole 321 is formed in the first connecting plate 32. At the same time, a second through hole 331 is formed in the second connecting plate 33. A nut groove 332 is formed at the end of the second through hole 331. A connecting nut 333 is embedded in the nut groove 3324. A threaded shaft 34 passing through the first through hole 321 and the second through hole 331 and threadedly connected in the connecting nut 333 is provided at the end of the docking pipe 3. At the same time, a knob 341 is fixed at one end of the threaded shaft 34 away from the connecting nut 333.

[0027] Refer to Figure 1 , Figure 4 , a connecting member 5 for detachably connecting the end of the shaft pipe 21 to the inside of the docking pipe 3 is further provided on the docking pipe 3. The connecting member 5 includes a swing arm 51, a swing shaft 52, a connecting ear 53, a shaft groove 54, a pressing block 55, a return spring 56, a positioning hook 57, a first hook hole 58, and a second hook hole 59. The swing arm 51 is arranged on the upper side of the docking pipe 3. The swing shaft 52 is integrally arranged at both sides of the middle of the swing arm 51. The connecting ear 53 is integrally arranged on the upper side of the docking pipe 3 and at the position of the swing shaft 52. The shaft groove 54 is formed in the connecting ear 53 for the swing shaft 52 to be embedded. The pressing block 55 is integrally arranged at one end of the swing arm 51. The return spring 56 abuts against the lower side of the pressing block 55 at one end and abuts against the upper side of the docking pipe 3 at the other end. A positioning table 35 penetrating into the return spring 56 is integrally arranged on the upper side of the docking pipe 3. The positioning hook 57 is integrally arranged at one end of the swing arm 51 away from the pressing block 55. The first hook hole 58 is formed in the docking pipe 3 for the positioning hook 57 to pass through. The second hook hole 59 is formed in the shaft pipe 21 for the positioning hook 57 to pass through.

[0028] Principle: First, one end of the shaft pipe 21 on the transmission shaft 2 is embedded in the docking pipe 3. The end of the transmission shaft 2 can enter the docking pipe 3 together with the shaft pipe 21. Then, the spline shaft 44 at the end of the transmission shaft 2 can be embedded in the spline sleeve 42. At the same time, the threaded shaft 34 is rotated by the knob 341. Since the connecting nut 333 is embedded in the nut groove 332, the first connecting plate 32 and the second connecting plate 33 can be offset towards the side close to each other at this time. Finally, the end of the docking pipe 3 at the long strip groove 31 can be constricted to clamp the end of the second connecting pipe; then after the motor main body 1 is started, the motor main body 1 can drive the driving gear 41 to rotate. The driving gear 41 can drive the spline sleeve 42 to rotate through the driven gear 43. Finally, the transmission shaft 2 can be driven to rotate;

[0029] When the end of the shaft tube 21 needs to be embedded in the docking tube 3, first press down the pressing block 55, so that the return spring 56 is compressed and the positioning hook 57 swings upward. Subsequently, the shaft tube 21 can be smoothly embedded in the docking tube 3. Then release the pressing block 55. At this time, under the action of the elastic restoring force of the return spring 56, the positioning hook 57 can pass through the first hook hole 58 and then penetrate into the second hook hole 59. At this time, the end of the shaft tube 21 in the docking tube 3 can be positioned through the positioning hook 57. When the shaft tube 21 needs to be disassembled, only need to press down the pressing block 55 again so that the positioning hook 57 disengages from the first hook hole 58 and the second hook hole 59, and then the shaft tube 21 in the docking tube 3 can be pulled out. Finally, the detachable connection of the shaft tube 21 in the docking tube 3 can be realized.

Claims

1. A motor assembly that facilitates quick installation of an external transmission shaft, comprising a motor body (1) and a transmission shaft (2) located at the output end of the motor body (1), characterized in that: The outer side of the transmission shaft (2) is rotatably connected to a shaft tube (21); the output end of the motor body (1) is provided with a butt joint tube (3) for inserting one end of the shaft tube (21); a transmission member (4) for connecting the output shaft of the motor body (1) with the end of the transmission shaft (2) is provided in the butt joint tube (3); and a connecting member (5) for detachably connecting the end of the shaft tube (21) in the butt joint tube (3) is provided on the butt joint tube (3).

2. A motor assembly that facilitates quick installation of an external transmission shaft according to claim 1, characterized in that: The transmission member (4) comprises a driving gear (41) arranged on the output shaft of the motor body (1), a spline sleeve (42) rotatably connected in the butt joint tube (3) and with one end extending to the upper side of the driving gear (41), a driven gear (43) key-connected to the end of the spline sleeve (42) and meshing with the driving gear (41), and a spline shaft (44) arranged at one end of the transmission shaft (2) and used for being inserted into the spline sleeve (42).

3. A motor assembly that facilitates quick installation of an external transmission shaft according to claim 1, characterized in that: A long groove (31) extending in a direction parallel to the extending direction of the butt joint tube (3) is provided at a side edge of one end of the butt joint tube (3) away from the motor body (1); a first connecting plate (32) is provided at the end of the butt joint tube (3) and located on one side of the long groove (31); a second connecting plate (33) is provided at the end of the butt joint tube (3) and located on the other side of the long groove (31); a first through hole (321) is provided on the first connecting plate (32); a second through hole (331) is provided on the second connecting plate (33); a nut groove (332) is provided at the end of the second through hole (331); a connecting nut (333) is embedded in the nut groove (332); a threaded shaft (34) is provided at the end of the butt joint tube (3) and passes through the first through hole (321) and the second through hole (331) and is then threadedly connected to the connecting nut (333); a knob (341) is also provided at the end of the threaded shaft (34) away from the connecting nut (333).

4. A motor assembly that facilitates quick installation of an external transmission shaft according to claim 1, characterized in that: The connecting member (5) comprises a swing arm (51) arranged on the upper side of the butt joint tube (3), a swing shaft (52) arranged at both sides of the middle of the swing arm (51), a connecting ear (53) arranged on the upper side of the butt joint tube (3) and located at the position of the swing shaft (52), an axis groove (54) provided on the connecting ear (53) and for the swing shaft (52) to be inserted, a pressing block (55) provided at one end of the swing arm (51), a return spring (56) having one end pressed against the lower side of the pressing block (55) and the other end pressed against the upper side of the butt joint tube (3), a positioning hook (57) provided at the end of the swing arm (51) away from the pressing block (55), a first hook hole (58) provided on the butt joint tube (3) and for the positioning hook (57) to pass through, and a second hook hole (59) provided on the axis tube (21) and for the positioning hook (57) to pass through.

5. A motor assembly that facilitates quick installation of an external transmission shaft according to claim 4, characterized in that: A positioning platform (35) which penetrates into a return spring (56) is arranged on the upper side of the butt joint pipe (3).

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