Adjustable pruning shears

Abstract

The utility model discloses a pair of adjustable pruning shears, belongs to the field of pruning shears, solves the problem that a blade assembly is inconvenient to grind, and adopts the technical scheme that the pair of adjustable pruning shears mainly comprises a casing, the blade assembly and a driving device, the blade assembly comprises a first blade and a second blade, and the driving device comprises a driving motor and a cam mechanism. The driving motor drives the first blade and the second blade to slide relatively through the cam mechanism, the machine shell is further provided with a limiter and an adjusting mechanism, and the adjusting mechanism comprises an operation part, a first reset piece and a connecting part which can be in transmission connection with the cam mechanism. The operating part controls the connecting part to be in transmission connection with the cam mechanism so as to drive the first blade and the second blade to slide relatively, the first reset piece enables the connecting part to have the movement trend of being separated from the cam mechanism, and the limiter limits the connecting part and the cam mechanism to be in transmission connection in the starting state of the driving motor. The blade assembly can be manually and finely adjusted, and a cutting edge can be conveniently ground.

Description

TECHNICAL FIELD

[0001] The utility model discloses an adjustable pruning shears belongs to pruning shears technical field. BACKGROUND

[0002] Pruning shears are commonly used tools in garden operation, and the blade assembly of pruning shears is stacked by two relatively slidable blades, in the running process of pruning shears, the relative sliding of the two blades makes the blade edges of the two blades dislocated to realize shearing, and after long-term use, the blade edges will gradually blunt, thereby affecting the shearing effect of pruning shears, therefore, the blade edges need to be ground to maintain the sharpness of the blade edges, and the relative positions of the two blades after the shutdown of the existing pruning shears are completely random and uncontrollable, and the user cannot manually adjust the blade assembly after the shutdown of the pruning shears, therefore, in most cases, the two blades will affect each other, so that the user is difficult to grind the blade edges, in addition, when the blade assembly needs to be replaced, the two blades need to be moved to a specific position, since the relative positions of the two blades after the shutdown of the pruning shears are completely random and uncontrollable, the position of the blade needs to be manually moved, and if the hand directly contacts the blade edge, the hand is more likely to be scratched, and if the hand of the user directly contacts the connecting rod at the root of the blade, the connecting rod is easy to be stained with oil, which is not convenient to clean and reduces the replacement efficiency of the blade assembly. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a kind of adjustable pruning shears, and the user can manually fine-tune blade assembly after the shutdown of pruning shears, so that the position of blade edge is more easily ground.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] An adjustable pruning shears includes a casing, a blade assembly and a drive device, the blade assembly includes a first blade and a second blade that can slide relative to each other, the drive device includes a drive motor and a cam mechanism, the drive motor drives the first blade and the second blade to slide relative to each other through the cam mechanism, the casing further includes a limiter and an adjustment mechanism, the adjustment mechanism includes an operating part, a first return element, and a connecting part that can be drivingly connected with the cam mechanism, the operating part controls the driving connection between the connecting part and the cam mechanism to drive the relative sliding of the first blade and the second blade, the first return element makes the connecting part have a movement tendency separated from the cam mechanism, and the limiter limits the driving connection between the connecting part and the cam mechanism in the starting state of the drive motor.

[0006] The utility model has the beneficial effects that:

[0007] The utility model discloses a limit ware and adjusting mechanism are equipped in the shell, and the adjusting mechanism includes operating part, first reset piece and connecting portion, when the user needs to grind the blade edge, the user can control the movement of connecting portion through operating part, to make connecting portion and cam mechanism realize transmission connection, at this time, the user can drive first blade and second blade to slide relatively through connecting portion, to realize the manual regulation of blade assembly, so that the blade edge of first blade and second blade can be fine tuned to the position suitable for grinding, provide the convenience for the subsequent grinding blade edge of the user, and the blade edge can be fine tuned to the suitable position without the blade assembly being disassembled, make the regulation of blade assembly be more free and convenient, help to improve the working efficiency of the user grinding blade edge, in addition, the first reset piece makes connecting portion have the movement trend of separating from cam mechanism, so when the user releases the force to operating part, the first reset piece will make connecting portion and cam mechanism realize automatic separation, and the first reset piece will also produce resistance to transmission connection of connecting portion and cam mechanism, so that the transmission connection of connecting portion and cam mechanism can be prevented from being combined at will, avoid the normal operation of adjusting mechanism affecting driving motor and cam mechanism, reduce the possibility of driving motor and cam mechanism being damaged, secondly, the limit ware can limit the transmission connection of connecting portion and cam mechanism under the driving motor starting state, because under the driving motor starting state, the output end of driving motor drives cam mechanism to rotate, to make blade assembly cut, and in the rotating process of cam mechanism, if connecting portion is combined with cam mechanism, connecting portion will interfere with the rotation of cam mechanism, make connecting portion and cam mechanism have relatively strong impact, and connecting portion and cam mechanism are easy to be damaged, but the limit ware can prevent the user from manually operating adjusting mechanism and making connecting portion and cam mechanism combine during the movement of pruning shears, avoid the misoperation phenomenon of the user, and then can play the protection role to connecting portion and cam mechanism, reduce the possibility of connecting portion and cam mechanism being damaged by impact, and also can improve the use safety of pruning shears, in addition, when needing to replace blade assembly, connecting portion and cam mechanism are combined through operating part, and then the user can manually fine tune blade assembly through operating part, make the relative position of first blade and second blade adjust to the detachable position, and then can quickly complete the disassembly of blade assembly, help to improve the disassembly efficiency of blade assembly, also can avoid the user directly contacting blade assembly with hand, reduce the possibility of the user being cut by blade, and help to improve the use safety.

[0008] Preferably, the shell is provided with a through hole for the adjusting mechanism to pass through, the adjusting mechanism is rotationally connected with the shell through the through hole, the operating part is exposed outside the shell, the adjusting mechanism slides along the through hole to make the connecting portion and the cam mechanism transmission connected or separated, and the first reset piece is limited between the shell and the operating part.

[0009] As preferred, the adjusting mechanism further comprises a connecting shaft, the machine shell is provided with a guide hole matched with the connecting shaft, one end of the connecting shaft is fixedly connected with the operating part, the other end is at least partially located in the guide hole, and the connecting part is fixedly connected with the part of the connecting shaft located in the machine shell. By using the foregoing technical scheme, the matching of the connecting shaft and the guide hole can ensure the accurate movement track of the connecting shaft in the machine shell, and further ensure that the connecting part can stably engage with the cam mechanism. In addition, the guide hole can also guide the movement of the connecting shaft, so that the sliding of the connecting shaft is smoother, and the possibility of the connecting shaft being stuck is reduced.

[0010] As preferred, the bottom wall around the through hole is provided with a buffer pad, and the first reset member drives the connecting part to separate from the cam mechanism and abut against the buffer pad. By using the foregoing technical scheme, the buffer pad can reduce the impact between the connecting part and the machine shell, and can effectively prevent the connecting part from being dislocated or damaged due to long-term impact, thereby helping to prolong the service life of the connecting part.

[0011] As preferred, the limiter comprises a driver and a limiting block, the limiting block has a first position and a second position, the first position of the limiting block makes the limiting block be located on the movement path of the connecting part to limit the transmission connection between the connecting part and the cam mechanism, and the second position of the limiting block makes the limiting block be away from the connecting part to release the limitation on the connecting part. By using the foregoing technical scheme, when the limiting block is in the first position, the limiting block blocks the movement path of the connecting part, thereby preventing the movement of the connecting part and preventing the connecting part from engaging with the cam mechanism. Therefore, the limiter can effectively prevent the connecting part from being misengaged with the cam mechanism, and can protect the connecting part and the cam mechanism.

[0012] As preferred, the driver comprises a solenoid valve and an armature shaft, the limiting block is fixed to one end of the armature shaft away from the solenoid valve, a second reset member is arranged on the armature shaft, the solenoid valve is electrified to attract the armature shaft to make the limiting block be away from the connecting part and reach the second position, and the second reset member acts on the armature shaft to make the limiting block reach the first position when the solenoid valve is de-energized. By using the foregoing technical scheme, the position of the limiting block can be accurately controlled through the electrification and de-energization of the solenoid valve, so as to realize the reliable limitation and contact of the transmission connection between the connecting part and the cam mechanism. In addition, the solenoid valve as a control element has the characteristics of fast response speed and high control precision, so as to ensure that the limiting block can quickly and accurately cut into or cut out the movement path of the connecting part.

[0013] As preferred, the machine shell is further provided with a control mechanism, the control mechanism comprises a control panel and a control switch, the control switch is connected in series between the control panel and the solenoid valve, the control panel blocks the electrical connection with the solenoid valve during the operation of the driving motor, and the control switch controls the on-off of the solenoid valve after the driving motor is stopped.

[0014] As preferred, the cam mechanism comprises a first gear wheel arranged rotatably in the casing, and the output end of the driving motor is provided with a second gear wheel in transmission connection with the first gear wheel, and the outer periphery side of the connecting portion is provided with a toothed portion in meshing connection with the first gear wheel.

[0015] As preferred, the outer surface of the casing is provided with a recess, and the top end surface of the operating portion is not higher than the notch of the recess. With the foregoing technical scheme, the top end surface of the operating portion is not higher than the notch of the recess, which can effectively reduce the direct contact of the operating portion with external objects, thereby reducing the risk of damage of the operating portion caused by impact, friction, etc., and can also reduce the possibility of misoperation of the operating portion, which is helpful to improve the use safety of the pruning shears.

[0016] Other features and advantages of the present application will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings:

[0018] Figure 1 It is an exploded view of the adjustable pruning shears of the present application;

[0019] Figure 2 It is a structural schematic view of the adjustable pruning shears of the present application;

[0020] Figure 3 It is Figure 2 It is a local enlarged view of part A in the figure;

[0021] Figure 4 It is a sectional view of the adjustable pruning shears of the present application;

[0022] Figure 5 It is Figure 4 It is a local enlarged view of part B in the figure;

[0023] Figure 6 It is a sectional view of the limiter in the adjustable pruning shears of the present application;

[0024] Figure 7 It is a structural schematic view of the grinding blade in the adjustable pruning shears of the present application.

[0025] Label: 1, the shell; 11, through hole; 12, guide hole; 13, groove; 14, buffer pad; 2, cam mechanism; 21, first gear; 211, protrusion; 22, connecting rod; 3, blade assembly; 31, first blade; 32, second blade; 4, adjusting mechanism; 41, operating part; 42, connecting part; 43, first reset member; 44, connecting shaft; 5, limiter; 51, electromagnetic valve; 52, armature shaft; 521, positioning protrusion; 53, second reset member; 54, limit block; 551, housing; 552, end cover; 553, fixed plate; 61, control panel; 62, drive motor; 621, second gear; 63, control switch. DETAILED DESCRIPTION

[0026] The technical solutions of the embodiments of the utility model will be explained and described below in combination with the drawings of the embodiments of the utility model. However, the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without making creative efforts all belong to the protection scope of the utility model.

[0027] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are the orientation or positional relationship based on the drawings shown, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] Embodiment one:

[0030] As Figures 1 to 7As shown in the figure, the embodiment shows an adjustable pruning shears, comprising a casing 1, a blade assembly 3 and a driving device, wherein the blade assembly 3 comprises a first blade 31 and a second blade 32, the first blade 31 and the second blade 32 are attached to each other and can slide relative to each other, the driving device comprises a driving motor 62 and a cam mechanism 2, the cam mechanism 2 comprises a first gear 21 rotatably installed in the casing 1 and two connecting rods 22 connected with the first blade 31 and the second blade 32 respectively, the output shaft of the driving motor 62 is provided with a second gear 621 which keeps meshing with the first gear 21, the driving motor 62 drives the first gear 21 to rotate through the second gear 621 after starting, the first gear 21 is provided with a protrusion 211 on both upper and lower sides, the protrusion 211 is eccentrically arranged relative to the first gear 21, and the two protrusions 211 are centrally symmetrically arranged relative to the central axis of the first gear 21, one end of the connecting rod 22 is rotatably connected with the protrusion 211, and the other end is rotatably connected with the first blade 31 or the second blade 32, with the rotation of the first gear 21, the connecting rod 22 drives the first blade 31 and the second blade 32 to approach or move away from the first gear 21, that is, the first blade 31 and the second blade 32 reciprocate along the length direction of the blade assembly 3, since the eccentric positions of the two protrusions 211 are different and the two protrusions 211 are centrally symmetrically arranged relative to the central axis of the first gear 21, the movement directions of the first blade 31 and the second blade 32 are opposite, so that the cutting edges of the first blade 31 and the second blade 32 can reciprocate to approach and separate, thereby achieving the shearing effect.

[0031] As Figure 1 shown in the figure, the casing 1 in the embodiment is also provided with a limiter 5 and an adjusting mechanism 4, wherein the adjusting mechanism 4 comprises an operating part 41, a first reset part 43 and a connecting part 42 which can be drivingly connected with the cam mechanism 2, the operating part 41 controls the driving connection of the connecting part 42 with the cam mechanism 2 to drive the relative sliding of the first blade 31 and the second blade 32, the first reset part 43 makes the connecting part 42 have a movement tendency of being separated from the cam mechanism 2, and the limiter 5 limits the driving connection of the connecting part 42 and the cam mechanism 2 in the starting state of the driving motor 62.

[0032] The housing 1 in the embodiment is provided with a limiter 5 and an adjusting mechanism 4. The adjusting mechanism 4 includes an operation part 41, a first reset part 43 and a connecting part 42. When a user needs to grind the blade edge, the user can control the movement of the connecting part 42 through the operation part 41 to make the connecting part 42 in driving connection with the cam mechanism 2. At this time, the user can drive the first blade 31 and the second blade 32 to slide relatively through the connecting part 42 to realize the manual adjustment of the blade assembly 3, so that the blade edges of the first blade 31 and the second blade 32 can be finely adjusted to a position suitable for grinding, which provides convenience for the user to grind the blade edge in the subsequent process. The blade edges can be finely adjusted to a suitable position without disassembling the blade assembly 3, so that the adjustment of the blade assembly 3 is more free and convenient, which helps to improve the working efficiency of the user to grind the blade edge. In addition, the first reset part 43 makes the connecting part 42 have a movement trend of being separated from the cam mechanism 2. Therefore, when the user releases the force on the operation part 41, the first reset part 43 will make the connecting part 42 automatically separated from the cam mechanism 2. At the same time, the first reset part 43 will also generate resistance to the driving connection between the connecting part 42 and the cam mechanism 2. Therefore, the connecting part 42 and the cam mechanism 2 can be effectively prevented from being randomly engaged, the normal operation of the adjusting mechanism 4 and the cam mechanism 2 can be avoided, and the possibility of damage of the adjusting mechanism 4 and the cam mechanism 2 is reduced. In addition, the limiter 5 can limit the driving connection between the connecting part 42 and the cam mechanism 2 in the starting state of the driving motor 62. Since the output end of the driving motor 62 drives the cam mechanism 2 to rotate to make the blade assembly 3 to shear in the starting state of the driving motor 62, if the connecting part 42 is engaged with the cam mechanism 2 during the rotation of the cam mechanism 2, the connecting part 42 will interfere with the rotation of the cam mechanism 2, so that the connecting part 42 and the cam mechanism 2 will collide relatively strongly, which is easy to cause damage to the connecting part 42 and the cam mechanism 2. The limiter 5 can prevent the user from manually operating the adjusting mechanism 4 and engaging the connecting part 42 with the cam mechanism 2 during the movement of the pruning shears, so as to avoid the misoperation of the user. Therefore, the connecting part 42 and the cam mechanism 2 can be protected, the possibility of damage caused by the collision between the connecting part 42 and the cam mechanism 2 is reduced, and the use safety of the pruning shears is improved. In addition, when the blade assembly 3 needs to be replaced, the connecting part 42 is engaged with the cam mechanism 2 through the operation part 41. Then the user can manually fine-adjust the blade assembly 3 through the operation part 41 to adjust the relative position of the first blade 31 and the second blade 32 to a detachable position, so as to quickly complete the disassembly of the blade assembly 3, improve the disassembly efficiency of the blade assembly 3, and avoid the user directly touching the blade assembly 3 with hands, so as to reduce the possibility of being cut by the blade and improve the use safety.

[0033] As Figures 2 to 4As shown, the adjustment mechanism 4 in this embodiment includes a connecting shaft 44, an operating part 41, a first reset member 43, and a connecting part 42. The housing 1 has a through hole 11 through which the connecting shaft 44 passes. The connecting shaft 44 can slide along the axial direction of the through hole 11 and can also rotate relative to the through hole 11. The operating part 41 is fixed to the end of the connecting shaft 44 that protrudes from the housing 1, that is, the operating part 41 protrudes from the outside of the housing 1, so that the user can operate the operating part 41. The connecting part 42 is fixed to the part of the connecting shaft 44 that is inside the housing 1. The first reset member 43 is fitted onto the outer periphery of the connecting shaft 44 and is confined around the through hole 11. Between the top wall and the bottom wall of the operating part 41, the first reset member 43 acts on the operating part 41, causing the connecting shaft 44 to have an upward sliding tendency. When the operating part 41 is not under force, the height of the operating part 41 exposed above the housing 1 is the maximum. At this time, the connecting part 42 is higher than the teeth of the first gear 21, and the teeth on the outer periphery of the connecting part 42 are separated from the teeth of the first gear 21. At this time, the connecting part 42 is not connected to the first gear 21 in transmission. The first reset member 43 can automatically separate the connecting part 42 from the cam mechanism 2, preventing the user from starting the drive motor 62 when the connecting part 42 is not disengaged from the first gear 21, which helps to reduce the safety hazards of the pruning shears.

[0034] like Figure 4 As shown, in this embodiment, the bottom wall around the through hole 11 is provided with a buffer pad 14. The first reset member 43 drives the connecting part 42 to separate from the cam mechanism 2 and abut against the buffer pad 14. The buffer pad 14 can reduce the impact force between the connecting part 42 and the housing 1, which can effectively prevent the connecting part 42 from being misaligned or damaged due to long-term impact, and help extend the service life of the connecting part 42.

[0035] like Figure 4 As shown, in this embodiment, the housing 1 is provided with a guide hole 12 that is adapted to the connecting shaft 44. The guide hole 12 is located on the lower side of the connecting shaft 44, and the bottom end of the connecting shaft 44 extends into the guide hole 12. During the sliding process of the connecting shaft 44 along the axial direction of the through hole 11, the bottom end of the connecting shaft 44 is always in the guide hole 12. The adaptation between the connecting shaft 44 and the guide hole 12 can ensure the precise movement trajectory of the connecting shaft 44 in the housing 1, thereby ensuring that the connecting part 42 can maintain a stable engagement with the cam mechanism 2. In addition, the guide hole 12 can also guide the movement of the connecting shaft 44, so that the sliding of the connecting shaft 44 is smoother and the possibility of the connecting shaft 44 getting stuck is reduced.

[0036] like Figure 1 and Figure 4As shown, the outer surface of the casing 1 in the embodiment is provided with a groove 13, the through hole 11 is arranged on the bottom wall of the groove 13, the operation part 41 is in the groove 13, and the top end surface of the operation part 41 is not higher than the groove of the groove 13, which can effectively reduce the direct contact of the operation part 41 with external objects, thereby reducing the risk of damage to the operation part 41 caused by impact, friction and the like; in addition, it can also reduce the possibility of misoperation of the operation part 41, which helps to improve the use safety of the pruning shears.

[0037] Of course, it can be understood that in other embodiments, the through hole 11 can also be in the shape of a long strip, and the connecting shaft 44 can move in the horizontal direction along the length direction of the through hole 11, and the movement of the connecting shaft 44 drives the connecting part 42 to realize engagement and disengagement with the first gear 21 in the horizontal direction, and the force of the first return member 43 on the adjusting mechanism 4 is parallel to the length direction of the through hole 11.

[0038] As shown, Figures 3 to 6 As shown, the limiter 5 in the embodiment includes an electromagnetic valve 51, an armature shaft 52 and a limiting block 54, the electromagnetic valve 51 has a shell 551 and an end cover 552 which are spliced with each other, the armature shaft 52 penetrates through the end cover 552, a second return member 53 is sleeved on the outer circumferential side of the armature shaft 52, a fixed plate 553 is fixedly connected to the end cover 552, a positioning protrusion 521 protruding in the radial direction is arranged on the outer circumferential side of the armature shaft 52, the two ends of the second return member 53 abut against the fixed plate 553 and the positioning protrusion 521 respectively, and the limiting block 54 is fixed to one end of the armature shaft 52 away from the electromagnetic valve 51. When the electromagnetic valve 51 is powered, the electromagnetic valve 51 generates an attractive force on the armature shaft 52, thereby attracting the armature shaft 52 to be close to the electromagnetic valve 51. At this time, the second return member 53 is compressed under the action of the fixed plate 553 and the positioning protrusion 521. When the electromagnetic valve 51 loses power, the armature shaft 52 loses the attractive force of the electromagnetic valve 51. At this time, the elastic force of the second return member 53 acts on the positioning protrusion 521, so that the armature shaft 52 moves towards the side away from the electromagnetic valve 51, thereby realizing the reciprocating movement of the limiting block 54. Through the power-on and power-off of the electromagnetic valve 51, the position of the limiting block 54 can be accurately controlled, thereby realizing the reliable restriction and contact of the connecting part 42 with the cam mechanism 2. In addition, the electromagnetic valve 51 as a control element has the characteristics of fast response speed and high control precision, which ensures that the limiting block 54 can quickly and accurately cut into or cut out the movement path of the connecting part 42.

[0039] As shown, Figure 3 and Figure 5As shown, the limiting block 54 has a first position and a second position in the embodiment. When the limiting block 54 is in the first position, the limiting block 54 is on the movement path of the connecting portion 42, thereby limiting the downward movement of the connecting portion 42 and the transmission connection with the first gear 21. When the limiting block 54 is in the second position, the limiting block 54 is out of the movement path of the connecting portion 42, thereby removing the limitation on the connecting portion 42 and preventing the connecting portion 42 from engaging with the cam mechanism 2. Therefore, the limiter 5 can effectively prevent the possibility of misengagement between the connecting portion 42 and the cam mechanism 2, and can protect the connecting portion 42 and the cam mechanism 2.

[0040] As shown in Figure 3 and Figure 5 , the armature shaft 52 is horizontally placed in the embodiment, and the armature shaft 52 drives the limiting block 54 to slide in the horizontal direction. When the connecting portion 42 is out of engagement with the first gear 21, the bottom end surface of the connecting portion 42 is lower than the top end surface of the limiting block 54, and the top end of the limiting block 54 is also higher than the top end surface of the tooth portion of the first gear 21. Therefore, even if the connecting portion 42 abuts against the limiting block 54, the connecting portion 42 is still higher than the first gear 21, thereby preventing the connecting portion 42 from engaging with the first gear 21. When the solenoid valve 51 loses power, the armature shaft 52 slides towards the first gear 21 under the action of the second return member 53, thereby pushing the limiting block 54 to the first position. At this time, the limiting block 54 is below the connecting portion 42, and the limiting block 54 can limit the downward stroke of the connecting portion 42, thereby preventing the connecting portion 42 from engaging with the first gear 21 under the limitation of the limiting block 54. For reference, see the blue solid line part in Figure 3 and Figure 5 . When the solenoid valve 51 is powered, the solenoid valve 51 attracts the armature shaft 52, and the armature shaft 52 drives the limiting block 54 to slide to the second position. At this time, the limiting block 54 is out of the movement path of the connecting portion 42, and the limiting block 54 does not interfere with the movement of the connecting portion 42, thereby allowing the connecting portion 42 to smoothly engage with the first gear 21. For reference, see the yellow dashed line part in Figure 3 and Figure 5 .

[0041] The housing 1 in the embodiment is also provided with a control mechanism, which comprises a control panel 61 and control switches 63. The control switches 63 are provided with a first switch for controlling the driving motor 62 and a second switch for controlling the electromagnetic valve 51. The control panel 61 is electrically connected to the driving motor 62 and the electromagnetic valve 51 through the control switches 63. During use, the user controls the start and stop of the driving motor 62 through the first switch. When the driving motor 62 is in the running state, the control panel 61 blocks the electrical connection with the electromagnetic valve 51. At this time, the user cannot control the electromagnetic valve 51 to be turned on through the second switch, thereby avoiding the user from causing the electromagnetic valve 51 to be powered on due to misoperation, so that the limiting block 54 releases the restriction on the connecting part 42, and ensures that the connecting part 42 cannot be engaged with the first gear 21 in the running state of the driving motor 62. Since the first gear 21 rotates at a high speed under the driving of the driving motor 62 in the starting state of the driving motor 62, if the connecting part 42 is engaged with the cam mechanism 2 during the rotation of the cam mechanism 2, the connecting part 42 will interfere with the rotation of the cam mechanism 2, so that the connecting part 42 and the cam mechanism 2 will collide relatively strongly, which is easy to cause damage to the connecting part 42 and the cam mechanism 2. The limiter 5 reduces the possibility of damage to the connecting part 42 and the cam mechanism 2 due to collision, and also improves the use safety of the pruning shears.

[0042] When the user needs to grind the blade edge of the blade assembly 3, the user first needs to stop the driving motor 62 through the first switch. At this time, the control panel 61 releases the power-off of the electromagnetic valve 51. The user can control the electromagnetic valve 51 to be powered on through the second switch. The electromagnetic valve 51 generates a magnetic force and attracts the armature shaft 52 to be close to the electromagnetic valve 51. At this time, the armature shaft 52 drives the limiting block 54 to move away from the first gear 21 and reach the second position. The limiting block 54 releases the restriction on the connecting part 42. The user presses the operating part 41, so that the connecting part 42 moves downward with the connecting shaft 44, until the connecting part 42 is engaged with the first gear 21. Then the user rotates the operating part 41, so that the first gear 21 is rotated through the connecting part 42. The first gear 21 drives the connecting rods 22 on both sides to move through the protrusions 211, so that the first blade 31 and the second blade 32 slide relatively, until the first blade 31 and the second blade 32 overlap each other. The user can grind the blade edge. When the blade assembly 3 is adjusted to the appropriate position, the user releases the operating part 41. The operating part 41 moves upward under the action of the first return member 43, so that the connecting part 42 is separated from the first gear 21. This avoids the operating part 41 from being mistakenly touched and causing the position of the blade assembly 3 to change. This ensures that the blade assembly 3 can be locked in the appropriate position, so as to facilitate the user to grind the blade edge.

[0043] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification not deviating from the function and structural principle of the present application will be included in the scope of the claims.

Claims

1. An adjustable pruning shear, comprising a housing (1), a blade assembly (3), and a drive device, wherein the blade assembly (3) includes a first blade (31) and a second blade (32) that can slide relative to each other, and the drive device includes a drive motor (62) and a cam mechanism (2), wherein the drive motor (62) drives the first blade (31) and the second blade (32) to slide relative to each other via the cam mechanism (2), characterized in that, The machine shell (1) is further provided with a limiter (5) and an adjusting mechanism (4), the adjusting mechanism (4) comprises an operating part (41), a first reset part (43) and a connecting part (42) which can be in transmission connection with the cam mechanism (2), the operating part (41) controls the transmission connection of the connecting part (42) and the cam mechanism (2) to drive the relative sliding of the first blade (31) and the second blade (32), the first reset part (43) makes the connecting part (42) have a movement tendency separated from the cam mechanism (2), and the limiter (5) limits the transmission connection of the connecting part (42) and the cam mechanism (2) in the starting state of the driving motor (62).

2. An adjustable pruner according to claim 1, wherein The machine shell (1) is provided with a through hole (11) through which the adjusting mechanism (4) passes, the adjusting mechanism (4) is in rotational fit with the machine shell (1) through the through hole (11), the operating part (41) is exposed outside the machine shell (1), the adjusting mechanism (4) slides along the through hole (11) to make the connecting part (42) in transmission connection or separation with the cam mechanism (2), and the first reset part (43) is limited between the machine shell (1) and the operating part (41).

3. An adjustable pruner according to claim 2, wherein The adjusting mechanism (4) further comprises a connecting shaft (44), the machine shell (1) is provided with a guide hole (12) matched with the connecting shaft (44), one end of the connecting shaft (44) is fixedly connected with the operating part (41), and the other end is at least partially located in the guide hole (12), and the connecting part (42) is fixedly connected with the part of the connecting shaft (44) located in the machine shell (1).

4. An adjustable pruner according to claim 2, wherein The bottom wall around the through hole (11) is provided with a buffer pad (14), the first reset part (43) drives the connecting part (42) to separate from the cam mechanism (2) and abut against the buffer pad (14).

5. The adjustable pruner of claim 1, wherein, The limiter (5) comprises a driver and a limiting block (54), the limiting block (54) has a first position and a second position, the first position of the limiting block (54) makes the limiting block (54) located on the movement path of the connecting part (42) to limit the transmission connection of the connecting part (42) and the cam mechanism (2), and the second position of the limiting block (54) makes the limiting block (54) away from the connecting part (42) to release the limitation of the connecting part (42).

6. An adjustable pruner according to claim 5, wherein, The driver comprises a solenoid valve (51) and an armature shaft (52), the limiting block (54) is fixed to one end of the armature shaft (52) away from the solenoid valve (51), a second reset part (53) is arranged on the armature shaft (52), the solenoid valve (51) is electrified to attract the armature shaft (52) to make the limiting block (54) away from the connecting part (42) and reach the second position, and the second reset part (53) acts on the armature shaft (52) to make the limiting block (54) reach the first position when the solenoid valve (51) is de-energized.

7. An adjustable pruner according to claim 6, wherein The machine shell (1) is further provided with a control mechanism, the control mechanism comprises a control panel (61) and a control switch (63), the control switch (63) is connected in series between the control panel (61) and the solenoid valve (51), the control panel (61) blocks the electrical connection with the solenoid valve (51) in the starting state of the driving motor (62), and the control switch (63) controls the on-off of the solenoid valve (51) after the driving motor (62) stops.

8. An adjustable pruner according to claim 1, wherein The cam mechanism (2) comprises a first gear (21) rotatably arranged in the casing (1), and the output end of a driving motor (62) is provided with a second gear (621) in transmission connection with the first gear (21), and the outer periphery side of the connecting portion (42) is provided with a tooth portion in mesh with the first gear (21).

9. The adjustable pruner of claim 1, wherein, The outer surface of the casing (1) is provided with a recess (13), and the top end surface of the operating portion (41) is not higher than the notch of the recess (13).

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