CN211090783U - Pruning machine - Google Patents

Abstract

In order to solve the problem that the labor intensity of an operator is high when the existing pruner is used, the utility model provides a pruner which comprises a front shell and a rear shell, wherein a driving assembly and a blade device which are connected with each other are arranged in the front shell, and a power supply device and a switch assembly are arranged in the rear shell; the rear end of the front shell is provided with a first connecting part, and the front end of the rear shell is provided with a second connecting part; the first connecting part is sequentially provided with a first bulge, a first groove, a second bulge and a second groove from back to front; the second connecting part is sequentially provided with a third bulge, a third groove, a fourth bulge and a fourth groove from front to back. This application is through setting up two-layer arch and recess matched with integrated configuration around the pruner on the casing, rotates the relative position of procapsid and back casing, has solved the problem that current pruner casing body connection structure operator intensity of labour is high when using.

Description

Pruning machine

Technical Field

The utility model relates to a garden instrument technical field especially relates to a pruner.

Background

The pruner is a commonly used garden tool, can be used for pruning or trimming shrubs and hedges, and has the advantages of high efficiency, convenient use and the like, along with the increasing awareness and requirements of people on vegetation ecology and urban gardens, and the wider application range. The existing pruner is generally hand-held and driven by a motor, for example, a pruner disclosed in chinese patent document CN201110345869.6, which solves the problem that tall branches cannot be pruned by providing an auxiliary holding part and an auxiliary button that can replace the functions of an auxiliary handle and an auxiliary button; after the auxiliary handle is replaced, the structure is similar to other pruners, and the phenomenon that an operator holds the pruner singly still exists.

Or, the pruning machine disclosed in chinese patent document CN201721289825.5, which has a storage battery as a power source and can be applied to shrub pruning in different environments, but this structure also has a phenomenon of single grip, and requires an operator to change different body postures or different grip modes to adapt to different pruning contents, which increases the labor intensity of the operator, and there is a safety risk in many grip modes or incorrect standing posture of the operator.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that current pruner operator intensity of labour is high when using, the utility model provides a pruner, its aim at improves the performance of gripping of pruner, and the operator of being convenient for uses, brings light, comfortable result of use for the operator.

The utility model discloses a realize like this: a pruner comprises a front shell and a rear shell, wherein a driving assembly and a blade device which are connected with each other are arranged in the front shell, a power supply device and a switch assembly are arranged in the rear shell, and the switch assembly, the power supply device and the driving assembly are electrically connected; the rear end of the front shell is provided with a first connecting part, and the front end of the rear shell is provided with a second connecting part;

The first connecting part is of a hollow cylindrical structure, a first bulge, a first groove, a second bulge and a second groove are sequentially arranged from back to front along the inner wall of the hollow cylindrical structure, and the second bulge is different from the first bulge in height;

The second connecting part is also of a cylindrical structure, and a third bulge, a third groove, a fourth bulge and a fourth groove are sequentially arranged from front to back along the outer wall of the cylindrical structure;

The first bulge is matched with the fourth groove, the first groove is matched with the fourth bulge, the second bulge is matched with the third groove, and the second groove is matched with the third bulge.

In the application, the blade device is connected with the driving assembly and placed in the front shell, the power supply device is connected with the switch assembly and placed in the rear shell, the power supply device can select a lithium battery and is mounted on the rear shell in a hanging manner, so that the weight of the front shell and the weight of the rear shell are balanced, the switch assembly can select a rocker power switch and is connected with the driving assembly and the power supply device, a handheld part is arranged on the rear shell, and the switch assembly is mounted on the handheld part and is convenient to operate; the switch assembly is arranged in the handheld part in an embedded mode, so that the appearance is attractive, and an operator can use the switch assembly more conveniently; in the application, the rear end of the front shell is provided with a first connecting part, and the front end of the rear shell is provided with a second connecting part; first connecting portion and second connecting portion all are cylindric structure, let procapsid and back casing realize relative rotation, specifically be second connecting portion block in first connecting portion, first protruding block is in the fourth recess promptly, fourth protruding block is in first recess, the protruding block of second is in the third recess, the protruding block of third is in the second recess, arch and recess through mutual interlock, the casing can rotate in a flexible way around letting, the second is protruding and first bellied highly different simultaneously, the stability of procapsid and back casing interlock has been improved.

This application is through setting up two-layer arch and recess matched with integrated configuration around the pruner on the casing, let the arch of pruner procapsid rotate along the recess of back casing, the arch of back casing also can rotate along the recess of procapsid simultaneously, so when the operator is in the face of different pruning content, through rotating the relative position of procapsid and back casing, need not to change different health postures or adopt different modes of gripping, the problem that current pruner casing body connection structure operator intensity of labour is high when using has been solved, improve pruner casing body connection structure's gripping performance, the operator of being convenient for uses, it is light to bring for the operator, comfortable result of use.

Drawings

Fig. 1 is a schematic view of a first viewing angle of a pruner according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a pruner housing according to an embodiment of the present invention;

FIG. 3 is an exploded view of the front and rear shells of a pruner according to an embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of a front housing of a pruner according to an embodiment of the present invention;

Fig. 5 is a schematic view of a second viewing angle of a rear housing of the pruner according to an embodiment of the present invention;

Fig. 6 is a schematic view of a third viewing angle of a rear shell of the pruner according to an embodiment of the present invention;

Fig. 7 is a schematic view of a pruner driving assembly and a blade device according to an embodiment of the present invention;

Fig. 8 is an exploded view of a pruner drive assembly according to an embodiment of the present invention;

Fig. 9 is an exploded view of a pruner blade device according to an embodiment of the present invention;

Fig. 10 is a schematic view of a first viewing angle of a protective cover of a pruner according to an embodiment of the present invention;

Fig. 11 is a schematic view of a second perspective of a protective cover of a pruner according to an embodiment of the present invention;

In the figure:

1 front housing, 101 first projection, 102 first recess, 103 second projection, 104 second recess, 105 front left housing, 106 front right housing, 2 rear housing, 201 third projection, 202 third recess, 203 fourth projection, 204 fourth recess, 205 rear left housing, 206 rear right housing, 207 slide slot, 208 spacing device, 3 locking device, 4 power supply device, 5 switch assembly, 6 drive assembly, 61 upper housing, 6101 opening, 6102 cover, 62 lower housing, 63 drive motor, 6401 drive gear, 6402 first drive gear, 6403 second drive gear, 7 blade device, 71 first blade, 7101 first cutter body, 7102 first connecting portion, 7103 first through hole, 72 second blade, 7201 second cutter body, 7202 second connecting portion, 7203 second through hole, 73 base disk, 74 first drive disk, 75 spacer disk, 76 second drive disk, 77 cutter holder cover plate, 8 protective cover 801 protective cover opening cover plate, 802 first convex strip, 803 second convex strip, 804 second protective plate, 805 third protective plate, 806 bolt connection part, 8061 first rib plate, 8062 second rib plate, 8063 third rib plate and 807 through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

A pruner comprises a front shell 1 and a rear shell 2, wherein a driving assembly 6 and a blade device 7 which are connected with each other are arranged in the front shell 1, a power supply device 4 and a switch assembly 5 are arranged on the rear shell 2, and the switch assembly 5, the power supply device 4 and the driving assembly 6 are electrically connected; a first connection part 7102 is provided at the rear end of the front case 1, and a second connection part 7202 is provided at the front end of the rear case 2;

The first connecting portion 7102 is of a hollow cylindrical structure, a first protrusion 101, a first groove 102, a second protrusion 103 and a second groove 104 are sequentially arranged from back to front along the inner wall of the hollow cylindrical structure, and the second protrusion 103 and the first protrusion 101 are different in height;

The second connecting portion 7202 is also of a cylindrical structure, and a third protrusion 201, a third groove 202, a fourth protrusion 203 and a fourth groove 204 are sequentially arranged from front to back along the outer wall of the cylindrical structure;

Wherein the first protrusion 101 matches with the fourth groove 204, the first groove 102 matches with the fourth protrusion 203, the second protrusion 103 matches with the third groove 202, and the second groove 104 matches with the third protrusion 201.

In the specific use of the utility model, as shown in the figure, the pruner comprises a front shell 1 and a rear shell 2, wherein a driving component 6 and a blade device 7 which are connected with each other are arranged in the front shell 1, the rear shell 2 is provided with a power supply device 4 and a switch component 5, and the switch component 5, the power supply device 4 and the driving component 6 are electrically connected; a first connection part 7102 is provided at the rear end of the front case 1, and a second connection part 7202 is provided at the front end of the rear case 2;

The first connecting portion 7102 is of a hollow cylindrical structure, a first protrusion 101, a first groove 102, a second protrusion 103 and a second groove 104 are sequentially arranged from back to front along the inner wall of the hollow cylindrical structure, and the second protrusion 103 and the first protrusion 101 are different in height;

The second connecting portion 7202 is also of a cylindrical structure, and a third protrusion 201, a third groove 202, a fourth protrusion 203 and a fourth groove 204 are sequentially arranged from front to back along the outer wall of the cylindrical structure;

Wherein the first protrusion 101 matches with the fourth groove 204, the first groove 102 matches with the fourth protrusion 203, the second protrusion 103 matches with the third groove 202, and the second groove 104 matches with the third protrusion 201.

This application is through setting up two-layer arch and recess matched with integrated configuration around the pruner on casing 2, let the protruding recess along back casing 2 of pruner procapsid 1 rotate, simultaneously the arch of back casing 2 also can rotate along procapsid 1's recess, so when the operator is in the face of different pruning contents, through rotating procapsid 1 and back casing 2's relative position, need not to change different health postures or adopt different modes of gripping, the problem that current pruner casing body connection structure operator intensity of labour is high when using has been solved, improve pruner casing body connection structure's gripping performance, and the operator of being convenient for uses, it is light to bring for the operator, comfortable result of use.

Further, in order to facilitate controlling the relative position between the front case 1 and the rear case 2, in the present application, the rear case 2 is further provided with a locking device 3, the first protrusion 101 is provided with an opening, the locking device 3 is matched with the opening, wherein the opening of the first protrusion 101 is arranged along the direction of the rotation axis of the first connecting portion 7102 or the second connecting portion 7202, a plurality of openings can be uniformly arranged, for example, 4 or 6 openings are uniformly arranged along the first protrusion 101, and a plurality of positions can also be arranged according to the trimming habit of an operator, for example, 3 openings are arranged in a quadrant of the first protrusion 101, in the actual operation, when the front case 1 and the rear case 2 are rotated to a desired position, the locking device 3 is clamped in the opening, so as to fix the relative position between the front case 1 and the rear case 2.

Further, in order to facilitate the locking control of the relative position between the front housing 1 and the rear housing 2, in the present application, the rear housing 2 is further provided with a sliding groove 207, the locking device 3 includes a locking bar, the locking bar and the sliding groove 207 are slidably disposed, wherein the locking device 3 in the present application is a flexible locking bar, such as a POM bar, the sliding groove 207 is disposed along a rotation axis of the second connecting portion 7202, the locking bar is clamped in the sliding groove 207, the locking bar is shifted by an operator, the locking bar can slide back and forth along the sliding groove 207, an opening of the sliding groove 207 abuts against the fourth groove 204, and the first protrusion 101 is clamped in the fourth groove 204; selecting the front shell 1, and when the opening on the first bulge 101 corresponds to the opening on the sliding groove 207, shifting the locking strip to enable the locking strip to be clamped at the opening on the first bulge 101, so as to fix the relative positions of the front shell 1 and the rear shell 2; when the relative position needs to be changed, the operator dials out the locking strip, let it leave the opening on first arch 101, then procapsid 1 and back casing 2 relative rotation, another opening on first arch 101 is relative in spout 207 opening, after adjusting the position, dial the locking strip card once more and go into first arch 101 opening, reach the relative position of fixed procapsid 1 and back casing 2, the adjustment is convenient, and through locking strip and open-ended block, its fastening force can be adjusted according to the cross-sectional shape size of locking strip, for example, select the locking strip thicker, its fastening force is big more, make things convenient for operating personnel to use.

Further, in order to facilitate shifting the locking bar, in the present application, the sliding groove 207 includes a first sliding groove and a second sliding groove which are connected, an opening of the first sliding groove contacts with the fourth groove 204, wherein the second sliding groove is arranged obliquely to the first sliding groove, a rail of the sliding groove 207 of the first sliding groove is horizontally arranged parallel to a rotation axis of the second connecting portion 7202, a second sliding groove is arranged obliquely at a terminal of the first sliding groove, wherein the second sliding groove can be arranged according to an outer shape of the rear housing 2, and a rail of the sliding groove 207 of the second sliding groove is arranged obliquely; the locking strip prevents that one part is located first slide behind spout 207, and another part is located the second slide, and when needs fixed procapsid 1, operating personnel stirred the locking strip and moved toward first slide, and when needs loosened procapsid 1, operating personnel stirred the locking strip and moved toward the second slide, so be convenient for stir the locking strip, convenient adjustment.

Further, for the convenience of carrying on spacingly to the locking strip, still be provided with stop device 208 on the back casing 2, in this application, be provided with the arch on the locking strip, wherein the protruding degree of depth that is higher than spout 207 still an organic whole is provided with the stopper on the back casing 2 for the stroke of stirring of control locking strip, the operator of being convenient for uses.

Further, for convenience of mounting, in the present application, the front case 1 includes a front left case 105 and a front right case 106, and the rear case 2 includes a rear left case 205 and a rear right case 206; therefore, the first protrusion 101, the second protrusion 103, the third protrusion 201, the fourth protrusion 203, the first groove 102, the second groove 104, the third groove 202 and the fourth groove 204 are divided into two parts, wherein the front left shell 105 and the front right shell 106 are locked by screws, and the rear left shell 205 and the rear right shell 206 are also locked by screws, in the assembly process, the rear left shell 205 and the rear right shell 206 are firstly connected by bolts to form the rear shell 2, then are clamped on the front left shell 105, and are matched and mounted with the front right shell 106, and finally, the front left shell 105 and the front right shell 106 are locked by screws, so that the assembly is completed, and the assembly process is simple and rapid; in another embodiment of the present application, the first connecting portion 7102 of the front case 1 and the second connecting portion 7202 of the rear case 2 may be made of an elastic material, and then the second connecting portion 7202 and the first connecting portion 7102 may be engaged by elastic deformation, so that the case structure of the pruner may be assembled.

According to the pruner protective cover 8, when in use, the main body of the protective cover 8 is of a plate-shaped structure and is used for shielding branches and leaves scattered in the pruning process; the lower end of the protective cover 8 is provided with an opening 801, and the protective cover can be clamped on the appearance of the pruner body through the opening 801 to prevent falling off; the inner side of the main body of the protective cover 8 is provided with a first convex strip 802 and a second convex strip 803 along the edge of the opening 801, wherein the first convex strip 802 and the second convex strip 803 are arranged at intervals, a groove formed between the first convex strip 802 and the second convex strip 803 is matched with the shape of the opening 801, and in actual use, the protective cover 8 can be prevented from falling off by clamping a protrusion on the appearance of the pruner body in the groove; therefore, the opening and the groove are combined for use, the rotation of the protective cover 8 in use is limited, and the stability of the protective cover 8 of the pruner in use is improved; and this application protection casing 8 structure can be directly with 8 locks of protection casing on the pruner body in the installation, and it is convenient to install, promotes the installation effectiveness.

Further, the lower end of the main body of the protective cover 8 is further provided with a second protective plate 804 and a third protective plate 805, wherein the second protective plate 804 and the third protective plate 805 are located at two sides of the opening 801, in this application, the second protective plate 804 and the third protective plate 805 are both plate-shaped structures and perpendicular to the main body of the protective cover 8, the second protective plate 804 and the third protective plate 805 can be integrally connected to the lower end of the main body of the protective cover 8 by welding or the like, and an end of the second protective plate 804 and an end of the third protective plate 805 both correspond to the groove, that is, the end of the second protective plate 804 is located between the first protruding strip 802 and the second protruding strip 803, and the end of the second protective plate 804 is also located between the first protruding strip 802 and the second protruding strip 803; in specific use, the second guard plate 804 and the third guard plate 805 are attached to the pruner body, so that the movement and rotation of the protective cover 8 are further limited, and the stability of the assembled protective cover 8 is improved. In other embodiments, the second shield 804 and the third shield 805 may be disposed at an angle to the main body of the enclosure 8.

Further, first sand grip 802 is higher than second sand grip 803 in this application, has further improved the stability after the installation of protection casing 8, can also follow the vertical direction slope setting of protection casing 8 on the first sand grip 802 simultaneously, improves the convenience of installation.

Further, in the present application, the inner side of the protection cover 8 is further provided with a bolt connection portion 806, which can be connected to the pruner body through a bolt to perform double fixation, so as to improve the stability of the protection cover 8; in addition, in the present application, the bolt connection portion 806 includes three surfaces of the square boss surrounded by the first rib plate 8061, the second rib plate 8062 and the third rib plate 8063, and the strength of the protective cover 8 is improved by the first rib plate 8061, the second rib plate 8062 and the third rib plate 8063, and the three surfaces of the boss are formed by the three rib plates, which have higher strength; and be provided with through-hole 807 on first gusset 8061 and second gusset 8062, the protruding block of pruner body is in the boss, then passes through-hole 807 through the bolt and fixes protection casing 8 on the pruner body, and protection casing 8 uses more firmly.

Further, the driving assembly 6 comprises a housing of the driving assembly 6 which is formed by enclosing an upper housing 61 and a lower housing 62, a containing cavity is formed in the housing, an opening is further formed in the side surface of the housing, the speed reducing mechanism is placed in the containing cavity, and the blade device 7 is connected with the speed reducing mechanism through the opening in the side surface of the housing; in the application, the driving motor 63 is mounted on the upper housing 61, wherein the upper housing 61 is integrally provided with an opening 6101, a connecting hole is further provided at the edge of the opening 6101, the driving motor 63 and the upper housing 61 are fastened together by passing through the connecting hole through a bolt assembly, the output end of the driving motor 63 is located in the accommodating cavity of the housing, and the output end is connected with an output gear through key connection or other conventional manners; the speed reducing mechanism comprises a driving gear 6401 and a transmission shaft, the driving gear 6401 is fixed in a containing cavity between an upper shell 61 and a lower shell 62 through a first connecting shaft, two ends of the first connecting shaft are respectively abutted against the upper shell 61 and the lower shell 62, the driving gear 6401 and a blade device 7 are sleeved on the first connecting shaft, and the driving gear 6401 and the blade device 7 are both rotationally connected with the first connecting shaft; the transmission shaft is of a hollow structure, a first transmission gear 6402 and a second transmission gear 6403 are integrally arranged on the transmission shaft, a second connecting shaft is further arranged in the containing cavity, two ends of the second connecting shaft are also abutted to the upper shell 61 and the lower shell 62, and the transmission shaft is sleeved on the second connecting shaft and is rotatably connected with the second connecting shaft; the first transmission gear 6402 is meshed with an output gear at the output end of the driving motor 63, and the second transmission gear 6403 is meshed with a driving gear 6401.

When the driving motor 63 is driven by the power supply to rotate, the speed is reduced for the first time through the meshed output gear and the first transmission gear 6402, then the speed is reduced for the second time through the meshed second transmission gear 6403 and the driving gear 6401, and finally the speed is output through the blade device 7.

In the application, the first transmission gear 6402 and the second transmission gear 6403 are arranged up and down, and the driving motor 63 is also arranged above the driving gear 6401, so that the structure is more compact, and the whole volume is reduced; the driving motor 63 is arranged above the driving gear 6401, so that the center of gravity of the pruning machine can be adjusted conveniently.

Further, in the present application, in order to improve the life of the reduction mechanism, each rotating portion is provided with lubricating oil or grease, and in order to prevent the lubricating oil from splashing and affecting the cutting of the blade, an oil baffle is integrated with the lower housing 62 in the present application.

Further, the upper housing 61 extends and is provided with the cover plate 6102 in this application, wherein the extending direction is consistent with the installation direction of the blade device 7, the blade is protected, and branches and leaves after trimming can be prevented from splashing, the clear and wide visual field of an operator is protected, and the operation safety is improved.

Further, in order to facilitate the connection of the driving assembly 6 with the pruner housing, in this application the upper housing 61 and/or the lower housing 62 are provided with a limiting means 208, wherein the limiting means 208 may be a protrusion or a boss, by providing a corresponding recess on the pruner housing, to facilitate the installation of the driving assembly 6 of this application.

Further, in the present application, the blade device 7 includes a first blade 71 and a second blade 72, the first blade 71 includes a first blade body 7101 and a first connecting portion 7102 disposed at the tail portion, a first through hole 7103 is disposed in the first connecting portion 7102, the second blade 72 includes a second blade body 7201 and a second connecting portion 7202 disposed at the tail portion, and the second connecting portion 7202 is provided with a second through hole 7203; the device also comprises a rotating shaft, and a base disc 73, a first driving disc 74, a partition disc 75, a second driving disc 76 and a driving gear 6401 which are sequentially arranged from bottom to top, wherein the first driving disc 74 is clamped in the first through hole 7103, and the second driving disc 76 is clamped in the second through hole 7203; a tool holder cover plate 77 is further included, the tool holder cover plate 77 being connected to the first and second tool bodies 7101 and 7201.

The driving gear 6401 is driven to rotate through the driving assembly 6, the driving gear 6401 can select a fluted disc structure, a first shaft hole is formed in the middle of the fluted disc, four connecting holes of the driving gear 6401 are uniformly formed in the periphery of the first shaft hole at intervals of 90 degrees, the second driving disc 76 is clamped in the second through hole 7203, a second shaft hole is formed in the second driving disc 76, three connecting holes are formed in the periphery of the second shaft hole at intervals of 90 degrees and correspond to the three connecting holes of the driving gear 6401; the partition plate disc 75 is positioned between the first blade 71 and the second blade 72, the partition plate disc 75 is of a circular plate-shaped structure, the diameter of the outer circle of the partition plate disc is matched with that of the addendum circle of the circular disc, a third shaft hole is also formed in the middle of the partition plate disc 75, four through holes are also formed in the periphery of the third shaft hole, and the positions of the four through holes correspond to the positions of connecting holes of the four driving gears 6401; the first driving disk 74 is clamped in the first through hole 7103, a fourth shaft hole is formed in the first driving disk 74, three connecting holes are formed in the periphery of the fourth shaft hole at intervals of 90 degrees and correspond to the connecting holes of the three driving gears 6401; the base disc 73 is also in a disc-shaped structure, the outer circle diameter of the base disc is matched with the addendum circle diameter of the fluted disc, a fifth shaft hole is also formed in the middle of the base disc 73, four through holes are also formed in the periphery of the fifth shaft hole, and the positions of the four through holes correspond to the positions of the connecting holes of the four driving gears 6401; the components are connected by a bolt assembly which passes through a through hole of the base disc 73, a through hole of the first driving disc 74, a through hole of the partition disc 75, a through hole of the second driving disc 76 and a through hole of the driving gear 6401, meanwhile, the first blade 71 is positioned between the driving gear 6401 and the partition disc 75, and the second blade 72 is positioned between the partition disc 75 and the base disc 73; the rotating shaft penetrates through the fifth shaft hole, the fourth shaft hole, the third shaft hole, the second shaft hole and the first shaft hole and is connected together.

In specific implementation, the driving gear 6401 can be driven by a rack or other gears which are meshed with each other to rotate around a rotating shaft, so that the first driving disk 74 is driven to rotate in the first through hole 7103, the second driving disk 76 rotates in the second through hole 7203, and the first blade 71 and the second blade 72 are further driven to move back and forth, relative motion is generated between the two blades, and the purpose of pruning branches and leaves is further achieved.

Although the present invention has been described and illustrated in detail with reference to specific embodiments thereof, it should be understood that various equivalent changes and modifications can be made therein in accordance with the present invention, and the functional effects thereof are not beyond the spirit of the present invention.

Claims (7)

1. A pruner comprises a front shell (1) and a rear shell (2), and is characterized in that a driving assembly (6) and a blade device (7) which are connected with each other are arranged in the front shell (1), a power supply device (4) and a switch assembly (5) are arranged in the rear shell (2), and the switch assembly (5), the power supply device (4) and the driving assembly (6) are electrically connected; a first connecting part (7102) is arranged at the rear end of the front shell (1), and a second connecting part (7202) is arranged at the front end of the rear shell (2); the first connecting part (7102) is of a hollow cylindrical structure, a first protrusion (101), a first groove (102), a second protrusion (103) and a second groove (104) are sequentially arranged from back to front along the inner wall of the hollow cylindrical structure, and the second protrusion (103) and the first protrusion (101) are different in height; the second connecting part (7202) is also of a cylindrical structure, and a third bulge (201), a third groove (202), a fourth bulge (203) and a fourth groove (204) are sequentially arranged from front to back along the outer wall of the cylindrical structure; the first protrusion (101) is matched with the fourth groove (204), the first groove (102) is matched with the fourth protrusion (203), the second protrusion (103) is matched with the third groove (202), and the second groove (104) is matched with the third protrusion (201).

2. The pruner of claim 1, wherein the rear housing (2) is further provided with a locking device (3), the first projection (101) is provided with an opening, and the locking device (3) is matched with the opening.

3. The pruner according to claim 2, wherein the rear housing (2) is further provided with a chute (207), said chute (207) comprising a first chute and a second chute connected thereto, wherein the second chute is arranged obliquely to the first chute.

4. The pruner of claim 1 or 3, wherein said front case (1) is further provided with a protective cover (8); the protection casing (8) include protection casing (8) main part, and protection casing (8) main part is platelike structure, and its lower extreme is provided with the opening, and protection casing (8) main part inboard sets up first sand grip (802) and second sand grip (803) along the opening edge, and wherein first sand grip (802) and second sand grip (803) interval set up, and the recess that constitutes between the two wants to match with the opening shape.

5. The pruner according to claim 4, wherein the inner side of the main body of the protective cover (8) is further provided with a bolt connecting part (806), the bolt connecting part (806) comprises a boss surrounded by a first rib plate (8061), a second rib plate (8062) and a third rib plate (8063), and the first rib plate (8061) and the second rib plate (8062) are provided with through holes (807).

6. The pruner of claim 1 or 5, wherein the drive assembly (6) comprises an upper housing (61), a lower housing (62), a drive motor (63) and a reduction mechanism arranged one above the other; the upper shell (61) and the lower shell (62) surround to form a containing cavity for containing the speed reducing mechanism, the upper shell (61) is provided with an opening (6101), the driving motor (63) is connected with the upper shell (61), and the output end of the driving motor (63) is positioned in the containing cavity; the speed reducing mechanism comprises a driving gear (6401) and a transmission shaft, wherein a first transmission gear (6402) and a second transmission gear (6403) are arranged on the transmission shaft, the first transmission gear (6402) is in contact with the output end of the driving motor (63), and the second transmission gear (6403) is in contact with the driving gear (6401).

7. The pruner according to claim 1 or 5, wherein the blade arrangement (7) comprises a first blade (71) and a second blade (72), the first blade (71) comprises a first cutter body (7101) and a first connecting portion (7102) arranged at the tail, a first through hole (7103) is provided in the first connecting portion (7102), the second blade (72) comprises a second cutter body (7201) and a second connecting portion (7202) arranged at the tail, the second connecting portion (7202) is provided with a second through hole (7203); the novel fan is characterized by further comprising a rotating shaft, and a base disc (73), a first driving disc (74), a partition plate disc (75), a second driving disc (76) and a driving gear (6401) which are sequentially arranged from bottom to top, wherein the first driving disc (74) is clamped in the first through hole (7103), and the second driving disc (76) is clamped in the second through hole (7203); still include knife rest apron (77), knife rest apron (77) are connected with first cutter body (7101) and second cutter body (7201).

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