Pruning machine

Abstract

The application discloses a pruning machine, which comprises a blade assembly, a casing, a prime mover, a transmission device, a first blade and a second blade. The first blade comprises a first body part and a first blade tooth part. The second blade comprises a second body part and a second blade tooth part. The first blade further comprises a first connecting group, which comprises a first driving part and a first connecting part connected with the first body part to make the first body part move with the first driving part. The second blade further comprises a second connecting group, which comprises a second driving part and a second connecting part connected with the second body part to make the second body part move with the second driving part. The first connecting part and the first body part are detachably connected, and the second connecting part and the second body part are detachably connected. At least part of the first connecting part is located outside the casing. The pruning machine can make the user quickly detach the first body part and the second body part.

Description

TECHNICAL FIELD

[0001] The present application relates to a garden tool, in particular to a hedge trimmer. BACKGROUND

[0002] The hedge trimmer is a kind of garden tool, which is widely used for trimming shrubs, hedges and other vegetation.

[0003] The hedge trimmer generally comprises a housing, a prime mover, a transmission device and a blade assembly, wherein the prime mover and the transmission device are arranged in the housing, and one part of the blade assembly is located in the housing and the other part extends out of the housing. The housing comprises a main body and a maintenance cover, the maintenance cover is arranged on the lower side of the main body, and the maintenance cover and the main body form a containing cavity containing the prime mover and the transmission device when they are connected. The blade assembly is arranged in the containing cavity. The maintenance cover and the main body are usually connected by a plurality of screws, and the number of screws for installing the maintenance cover is generally 6 to 8. The blade assembly comprises a first blade, a second blade and a bracket, and the first blade and the second blade are installed on the bracket by screws. The number of screws for installing the first blade and the second blade is usually 6 to 10.

[0004] We know that the blade assembly will be seriously worn out during repeated cutting of vegetation, so the operator needs to replace the blade assembly frequently. For the existing hedge trimmer, the operator needs to remove the maintenance cover first, and then remove the first blade and the second blade from the bracket when replacing the blade assembly. During the entire disassembly process, the operator usually needs to remove 12 to 18 screws, and it usually takes about 20 seconds to remove one screw. Therefore, it takes 4 to 10 minutes to remove the screws only, and then the new first blade and second blade need to be installed. The entire disassembly and assembly process takes about 20 minutes to half an hour, which will seriously reduce the work efficiency of the operator. Moreover, the removal of the maintenance cover exposes the transmission device, which may cause the position of each part in the transmission device to change, which will further prolong the time for replacing the blade assembly and even reduce the stability of the transmission device. Furthermore, replacing the entire first blade and second blade will greatly increase the operating cost of the operator. SUMMARY

[0005] To solve the problems of the prior art, the purpose of the present application is to provide a hedge trimmer which is convenient for users to replace the blade assembly and has low use cost.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] A pruning machine comprises: a blade assembly comprising a first blade and a second blade performing a cutting function when in relative motion; a housing formed with a receiving cavity; a prime mover arranged in the receiving cavity; a transmission device for transmitting power between the prime mover and the blade assembly to drive the first blade and the second blade to produce relative motion; the first blade comprises: a first body portion extending along a first linear direction; a first blade tooth portion for cutting vegetation; the second blade comprises: a second body portion extending along a second linear direction; a second blade tooth portion for cutting vegetation; the first blade further comprises: a first connecting group comprising a first driving portion connected with the transmission device to introduce driving force output by the transmission device into the first blade, and a first connecting portion connected with the first body portion to make the first body portion move with the first driving portion; the second blade further comprises: a second connecting group comprising a second driving portion connected with the transmission device to introduce driving force output by the transmission device into the second blade, and a second connecting portion connected with the second body portion to make the second body portion move with the second driving portion; wherein the first connecting portion and the first body portion constitute detachable connection, and the second connecting portion and the second body portion constitute detachable connection; at least part of the first connecting portion is located outside the housing.

[0008] Further, the pruning machine further comprises: a limiting member capable of limiting the first body portion from being detached from the first connecting portion and capable of limiting the second body portion from being detached from the second connecting portion, the limiting member having a limiting state and an unlocking state; when the limiting member is in the limiting state, the limiting member prevents the first body portion from being detached from the first connecting portion and prevents the second body portion from being detached from the second connecting portion; when the limiting member is in the unlocking state, the limiting member allows the first body portion to be detached from the first connecting portion and allows the second body portion to be detached from the second connecting portion.

[0009] Alternatively, the pruning machine further comprises: a limiting member for limiting the first body portion from being detached from the first connecting portion, the limiting member having a limiting state for limiting the first body portion from being detached from the first connecting portion and an unlocking state for allowing the first body portion to be detached from the first connecting portion, the limiting member being partially located in the housing, and the limiting member further comprising an operating portion capable of being operated by an operator at least partially without disassembling the housing.

[0010] Further, a ratio of a dimension of the part of the first connecting portion extending outside the housing in the first linear direction to a dimension of the first body portion in the first linear direction is greater than 0 and less than or equal to 0.5.

[0011] Further, the first body portion and the first connecting portion constitute detachable connection in a direction perpendicular to the first linear direction; and the second body portion and the second connecting portion constitute detachable connection in a direction perpendicular to the second linear direction.

[0012] Further, the first body part extends in a first plane, the first connecting part extends in a second plane, the first plane and the second plane are parallel and do not coincide; the second body part extends in a third plane, the second connecting part extends in a fourth plane, the third plane and the fourth plane are parallel and do not coincide.

[0013] Further, the first body part and the first connecting part have a height difference at the connection, the second body part and the second connecting part have a height difference at the connection.

[0014] Further, the first driving part and the first connecting part are integrally formed by one piece; the second driving part and the second connecting part are integrally formed by one piece.

[0015] Alternatively, the first driving part and the first connecting part are respectively formed by two different pieces; the second driving part and the second connecting part are respectively formed by two different pieces.

[0016] Further, the first connecting part is formed with a connecting hole, and the first body part is formed with or connected with a connecting member capable of being inserted into the connecting hole.

[0017] Alternatively, the first connecting part is formed with or connected with a connecting member, and the first body part is formed with a matching hole capable of being inserted by the connecting member.

[0018] Alternatively, the pruning machine further comprises a limiting member for limiting the first body part from being separated from the first connecting part, the limiting member has a limiting state for limiting the first body part from being separated from the first connecting part and an unlocking state for allowing the first body part to be separated from the first connecting part, and the limiting member is at least partially located outside the machine shell; a direction in which the first body part is separated from the first connecting part is defined as a first direction; the first blade is arranged at the lower side of the second blade; the limiting member prevents the first body part from being separated from the first connecting part along the first direction, and the first direction is perpendicular to the first straight line.

[0019] Further, the pruning machine further comprises a screw for positioning the limiting member in the locking state, and the number of the screws is less than or equal to 2, and the screws are located outside the machine shell.

[0020] Further, the pruning machine further comprises a screw for positioning the limiting member in the locking state, and the number of the screws is 1.

[0021] Further, the pruning machine further comprises a first type of screw passing through the limiting member along a third straight line direction perpendicular to the first straight line, and a second type of screw passing through the first blade and the second blade along a fourth straight line direction perpendicular to the first straight line and not passing through the limiting member; the first body part is formed with a mounting hole for the second type of screw to pass through, the mounting hole comprises a sliding part allowing the second type of screw to slide along a direction parallel to the first straight line and preventing the second type of screw from passing through, and a through hole part allowing the first body part to be separated from the second type of screw along a direction perpendicular to the first straight line.

[0022] Further, the maximum dimension of the sliding portion in the width direction is smaller than the maximum dimension of the through hole portion in the width direction.

[0023] Further, the mounting hole is further formed with a guide portion arranged at the connecting position of the sliding portion and the through hole portion; the guide portion guides the plurality of second type screws to engage with the mounting holes corresponding thereto in sequence when the first body portion is mounted; the guide portion guides the plurality of second type screws to disengage from the mounting holes corresponding thereto in sequence when the first body portion is dismounted.

[0024] Further, the connecting position of the first body portion and the first connecting portion is located outside the casing; the connecting position of the second body portion and the second connecting portion is located outside the casing.

[0025] The pruning machine can quickly replace the first body portion and the second body portion in the blade assembly, and can reduce the use cost of the user. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of the pruning machine of the first embodiment of the present application;

[0027] Figure 2 is Figure 1 is a plan view of the pruning machine in

[0028] Figure 3 is Figure 2 is a sectional view of the pruning machine in

[0029] Figure 4 is Figure 3 is an enlarged view of the partial structure of the blade assembly in

[0030] Figure 5 is Figure 3 is a sectional view of the partial structure of the eccentric assembly and the blade assembly in the pruning machine of

[0031] Figure 6 is Figure 5 is an enlarged view of the partial structure of the blade assembly in

[0032] Figure 7 is Figure 2 is a perspective view of the eccentric assembly and the blade assembly in the pruning machine of

[0033] Figure 8 is Figure 2 is an exploded view of the eccentric assembly and the blade assembly in the pruning machine of

[0034] Figure 9 is Figure 8 is an exploded view of the first blade and the second blade in the blade assembly in

[0035] Figure 10 isFigure 8 a plan view of a partial structure of the first body portion in the blade assembly in

[0036] Figure 11 Figure 8 a plan view of a partial structure of the second body portion in the blade assembly in

[0037] Figure 12 Figure 8 a plan view of the bracket in the blade assembly in

[0038] Figure 13 Figure 1 a perspective view of the trimmer in which the first body portion and the second body portion are detached;

[0039] Figure 14 Figure 1 a perspective view of the trimmer in which the first type of screw is detached;

[0040] Figure 15 Figure 1 a perspective view of the trimmer in which the limiting member is extracted;

[0041] Figure 16 Figure 1 a perspective view of the trimmer in which the limiting member is detached;

[0042] Figure 17 Figure 1 a perspective view of the trimmer in which the first body portion is detached from the first connecting portion;

[0043] Figure 18 Figure 1 a perspective view of the trimmer in which the first body portion is detached;

[0044] Figure 19 Figure 1 a perspective view of the trimmer in which the second body portion is detached from the second connecting portion;

[0045] Figure 20 Figure 1 a perspective view of the trimmer in which the second body portion is detached;

[0046] Figure 21

[0047] Figure 22 Figure 21 a sectional view of the structure shown in

[0048] Figure 23 Figure 21 a perspective view of the structure shown in

[0049] ​​​​​​​​​​​​​Figure 24 is Figure 23 a structural schematic view of the pressing plate in DETAILED DESCRIPTION

[0050] Figure 1 The pruning machine 100 of the first embodiment shown is used for an operator to cut various shrubs, hedges and the like vegetation.

[0051] As Figure 1 and Figure 2 shown, the pruning machine 100 comprises a casing 11 and a blade assembly 20 disposed at least partially outside the casing 11. As Figure 3 and Figure 4 shown, the pruning machine 100 further comprises a prime mover 12, which can be an electric motor in particular, and a transmission 13. The blade assembly 20 comprises a first blade 21 and a second blade 22 capable of relative movement. As Figure 5 to Figure 8 shown, the first blade 21 comprises a first body portion 211 extending along a first straight line 101, and the second blade 22 comprises a second body portion 221 extending along a second straight line 102. When the second blade 22 and the second blade 22 reciprocate relative to each other, the blade assembly 20 can perform the function of cutting vegetation. The prime mover 12 is used to drive the first blade 21 and the second blade 22 to produce relative movement. The prime mover 12 comprises a prime mover shaft 121 capable of rotating about a prime mover shaft line 103, which is also perpendicular to the first straight line 101 and perpendicular to the second straight line 102. The transmission 13 is used to realize power transmission between the prime mover 12 and the blade assembly 20, so as to drive the first blade 21 and the second blade 22 to produce relative movement. The casing 11 further comprises an accommodation cavity 111 formed therearound. The prime mover 12 and the transmission 13 are disposed in the accommodation cavity 111. The blade assembly 20 is partially disposed in the accommodation cavity 111 and partially disposed outside the accommodation cavity 111.

[0052] In order to facilitate the description of the technical solutions of the present application, the up, down, front, back, left and right as shown by the arrows in Figure 1 are defined. The up, down, left and right in the present embodiment are all with respect to the state of the pruning machine 100 in Figure 1 and Figure 2 .

[0053] The housing 11 comprises a main body portion 112 and a maintenance cover 113. The main body portion 112 surrounds a receiving cavity 111, and the receiving cavity 111 surrounded by the main body portion 112 is open downward. The maintenance cover 113 closes the open part of the receiving cavity 111 at the lower side of the main body portion 112 to close the receiving cavity 111. The maintenance cover 113 can be detachably connected to the main body portion 112 by means of a plurality of screws 114. When an operator needs to maintain the structure in the receiving cavity 111, such as the transmission 13, the operator can first unscrew the screws 114, and then detach the maintenance cover 113. When the maintenance cover 113 is detached, the receiving cavity 111 is open downward, and the transmission 13 is exposed. At this time, the operator can replace or maintain the transmission 13. The blade assembly 20 extends forward to the outside of the housing 11, so that the blade assembly 20 can cut the vegetation.

[0054] The transmission 13 comprises a reduction assembly 131 and an eccentric assembly 132. The reduction assembly 131 is used to reduce the rotation speed of the prime mover 12 to output to the eccentric assembly 132. In this embodiment, the reduction assembly 131 is a planetary gear train. The eccentric assembly 132 comprises an eccentric piece 132a, which comprises a central hole 132b, a first eccentric portion 132c and a second eccentric portion 132d. The first eccentric portion 132c and the second eccentric portion 132d are eccentrically arranged with respect to the central hole 132b, respectively. The first eccentric portion 132c is used to be connected with the first blade 21, and the second eccentric portion 132d is used to be connected with the second blade 22. In the front-rear direction parallel to the first straight line 101, the first eccentric portion 132c is eccentric to the rear with respect to the central hole 132b, and the second eccentric portion 132d is eccentric to the front with respect to the central hole 132b. In this way, when the reduction assembly 131 drives the eccentric piece 132a to rotate, the first eccentric portion 132c drives the first blade 21 to move forward, and the second eccentric portion 132d drives the second blade 22 to move backward. When the first eccentric portion 132c drives the first blade 21 to move backward, the second eccentric portion 132d drives the second blade 22 to move forward. Thus, the movement directions of the first blade 21 and the second blade 22 are opposite, and the whole formed by the first blade 21 and the second blade 22 can realize the cutting function.

[0055] As Figure 5 to Figure 11As shown, the first blade 21 comprises a first body part 211, a first blade tooth part 212 and a first connecting group 21a, the first connecting group 21a comprises a first driving part 213 and a first connecting part 214. The first body part 211 extends along the first straight line 101 direction. The first blade tooth part 212 is used for cutting vegetation, the number of the first blade tooth part 212 is multiple, and the multiple first blade tooth parts 212 are respectively arranged on the opposite sides of the first body part 211 in the width direction, that is, the first blade tooth part 212 is arranged on the left side and the right side of the first body part 211, and in this embodiment, the first blade tooth part 212 on the left side of the first body part 211 is staggered relative to the first blade tooth part 212 on the right side of the first body part 211. Or in other words, the first blade tooth part 212 on the left side of the first body part 211 is not aligned with the first blade tooth part 212 on the right side of the first body part 211. Or in other words, in the direction along the first straight line 101, the first blade tooth part 212 on the left side of the first body part 211 is arranged between the two adjacent first blade tooth parts 212 on the right side. The first blade tooth part 212 and the first body part 211 are integrally formed. The first driving part 213 is used for cooperating with and connecting with the first eccentric part 132c, and the first driving part 213 is used for converting the rotation of the first eccentric part 132c into the reciprocating movement of the first blade 21 along the first straight line 101 direction, so as to introduce the power output by the transmission device 13 into the first blade 21. The first driving part 213 is formed with a first driving hole 213a, and the first eccentric part 132c is arranged in the first driving hole 213a and can move along the hole wall of the first driving hole 213a, and when the first eccentric part 132c moves in the first driving hole 213a, it will drive the first driving part 213 to reciprocate along the first straight line 101 direction. The first connecting part 214 is used for connecting the first driving part 213 and the first body part 211, so that the first body part 211 reciprocates together with the first driving part 213.

[0056] The second blade 22 comprises a second body part 221, a second blade tooth part 222, and a second connecting group 22a, the second connecting group 22a comprising a second driving part 223 and a second connecting part 224. The second body part 221 extends along the second straight line 102. The second blade tooth part 222 is used for cutting vegetation, and the number of the second blade tooth part 222 is plural, and the plural second blade tooth part 222 is respectively arranged on the opposite sides of the width direction of the second body part 221, that is, the second blade tooth part 222 is arranged on the left side and the right side of the second body part 221, and in this embodiment, the second blade tooth part 222 on the left side of the second body part 221 is staggered with the second blade tooth part 222 on the right side of the second body part 221. Or in other words, the second blade tooth part 222 on the left side of the second body part 221 is not aligned with the second blade tooth part 222 on the right side of the second body part 221. Or in other words, in the direction along the second straight line 102, the second blade tooth part 222 on the left side of the second body part 221 is arranged between the two adjacent second blade tooth parts 222 on the right side. The second blade tooth part 222 and the second body part 221 are integrally formed. The second driving part 223 is used for cooperating with and connecting with the second eccentric part 132d, and the second driving part 223 is used for converting the rotation of the second eccentric part 132d into the reciprocating motion of the second blade 22 along the second straight line 102, so as to introduce the power output by the transmission device 13 into the second blade 22. The second driving hole 223a is formed on the second driving part 223, and the second eccentric part 132d is arranged in the second driving hole 223a and can move along the hole wall of the second driving hole 223a, and when the second eccentric part 132d moves in the second driving hole 223a, it will drive the second driving part 223 to reciprocate along the second straight line 102. The second connecting part 224 is used for connecting the second driving part 223 and the second body part 221, so that the second body part 221 reciprocates together with the second driving part 223.

[0057] The distance L1 between the first body part 211 and the center of the first driving hole 213a is greater than or equal to 80 mm and less than or equal to 500 mm, and the distance L2 between the second body part 221 and the center of the second driving hole 223a is greater than or equal to 80 mm and less than or equal to 500 mm. Further, the distance L1 between the first body part 211 and the center of the first driving hole 213a is greater than or equal to 130 mm and less than or equal to 320 mm, and the distance L2 between the second body part 221 and the center of the second driving hole 223a is greater than or equal to 130 mm and less than or equal to 320 mm. In this way, even if the connection between the first body part 211 and the first connecting part 214 is located in the casing 11, it is also convenient to arrange a corresponding window on the casing 11 to make the first body part 211 separate from the first connecting part 214.

[0058] We know that the first blade teeth 212 and the second blade teeth 222 are more likely to be worn and blunt during the repeated cutting of the vegetation for the blade assembly 20. In the present embodiment, the first connecting portion 214 and the first body portion 211 are detachably connected, and the second connecting portion 224 and the second body portion 221 are also detachably connected. At least part of one or both of the first connecting portion 214 and the second connecting portion 224 is located outside the casing 11. That is, at least part of the first connecting portion 214 is located outside the casing 11, or at least part of the second connecting portion 224 is located outside the casing 11, or at least part of the entirety of the first connecting portion 214 and the second connecting portion 224 is located outside the casing 11. In this way, when the first blade teeth 212 and the second blade teeth 222 are worn, the operator can quickly detach the first body portion 211 and the second body portion 221 from the outside of the casing 11 without detaching the maintenance cover 113, and replace the new first body portion 211 and the second body portion 221, avoiding the cumbersome process of detaching the parts inside the casing 11 after detaching the maintenance cover 113, and then installing them again. Therefore, the operator can quickly replace the first body portion 211 and the second body portion 221, thereby improving the convenience of operation. Moreover, the operator does not need to replace the first connecting group 21a and the second connecting group 22a when replacing the first blade teeth 212 and the second blade teeth 222, thereby greatly saving the use cost of the trimmer 100.

[0059] Furthermore, in the present embodiment, as an implementation, the connection between the first body portion 211 and the first connecting portion 214 is located outside the casing 11, and the connection between the second body portion 221 and the second connecting portion 224 is also located outside the casing 11. Both the first body portion 211 and the second body portion 221 are located outside the casing 11. In the direction parallel to the first straight line 101, the minimum distance L3 between the first body portion 211 and the casing 11 is greater than 0 and less than or equal to 300 mm, and the minimum distance L4 between the second body portion 221 and the casing 11 is greater than 0 and less than or equal to 300 mm. Furthermore, in the present embodiment, the first body portion 211 is arranged at the lower side of the second body portion 221, the minimum distance L3 between the first body portion 211 and the maintenance cover 113 is greater than 0 and less than or equal to 50 mm, and the minimum distance L4 between the second body portion 221 and the maintenance cover 113 is greater than 50 mm and less than or equal to 200 mm. In this way, it is more convenient for the operator to separate the first body portion 211 and the first connecting portion 214, and to separate the second body portion 221 and the second connecting portion 224.

[0060] The ratio of the dimension L5 of the portion of the first connecting portion 214 extending outside the casing 11 in the direction of the first straight line 101 to the dimension L6 of the first body portion 211 in the direction of the first straight line 101 is greater than 0 and less than or equal to 0.5. Further, the ratio of the dimension L5 of the portion of the first connecting portion 214 extending outside the casing 11 in the direction of the first straight line 101 to the dimension L6 of the first body portion 211 in the direction of the first straight line 101 is greater than 0.02 and less than or equal to 0.25. In this way, on the one hand, the portion of the first connecting portion 214 extending outside the casing 11 is long enough to stably drive the first body portion 211 to reciprocate, avoiding the first body portion 211 from shaking; on the other hand, the length of the portion of the first connecting portion 214 extending outside the casing 11 is not too long to cause the effective cutting portion of the first body portion 211 to be insufficient, affecting the cutting efficiency. It can be understood that the connection between the first body portion 211 and the first connecting portion 214 is not limited to being located outside the casing 11, and the connection between the second body portion 221 and the second connecting portion 224 is not limited to being located outside the casing 11. In fact, as another embodiment, the connection between the first body portion 211 and the first connecting portion 214 can also be located inside the casing 11, and the connection between the second body portion 221 and the second connecting portion 224 can also be located inside the casing 11, as long as some reasonable structures are provided on the casing 11 to enable the first body portion 211 and the first connecting portion 214 to be separated and the second body portion 221 and the second connecting portion 224 to be separated. In this way, it can be understood that the first connecting portion 214 and the first body portion 211 constitute a detachable connection, the projection of the connection between the first connecting portion 214 and the first body portion 211 in a plane perpendicular to the first straight line 101 is located outside the projection of the first eccentric portion 132c in the plane, further, the projection of the connection between the first connecting portion 214 and the first body portion 211 in the plane perpendicular to the first straight line 101 is located outside the projection of the eccentric assembly 132 in the plane; the second connecting portion 224 and the second body portion 221 constitute a detachable connection, the projection of the connection between the second connecting portion 224 and the second body portion 221 in a plane perpendicular to the second straight line 102 is located outside the projection of the second eccentric portion 132d in the plane, further, the projection of the connection between the second connecting portion 224 and the second body portion 221 in the plane perpendicular to the second straight line 102 is located outside the projection of the eccentric assembly 132 in the plane. Further, the minimum distance L7 between the connection between the first body portion 211 and the first connecting portion 214 and the rotation axis of the first eccentric portion 132c is greater than or equal to 80 mm and less than or equal to 500 mm. In fact, in the present embodiment, the rotation axis of the first eccentric portion 132c is also the original motor axis 103 of the original motor shaft 121.

[0061] Both of the above two manners can make the first body part 211 and the first connecting part 214 constitute detachable connection which can be separated without disassembling the maintenance cover 113, and also make the second body part 221 and the second connecting part 224 constitute detachable connection which can be separated without disassembling the maintenance cover 113. The specific embodiments are not limited to the above two manners.

[0062] In the present embodiment, the pruning machine 100 further comprises a limiting member 23 for limiting the first body part 211 from being separated from the first connecting part 214, and the limiting member 23 can also limit the second body part 221 from being separated from the second connecting part 224. The limiting member 23 has a limiting state for limiting the first body part 211 from being separated from the first connecting part 214 and an unlocking state for allowing the first body part 211 to be separated from the first connecting part 214. The limiting member 23 is at least partially arranged outside the machine shell 11. The limiting member 23 can be operated by the operator from outside the machine shell 11 to control the switching of the limiting member 23 from the limiting state to the unlocking state. When the limiting member 23 is in the limiting state, the limiting member 23 prevents the first body part 211 from being separated from the first connecting part 214 and prevents the second body part 221 from being separated from the second connecting part 224. When the limiting member 23 is in the unlocking state, the limiting member 23 allows the first body part 211 to be separated from the first connecting part 214 and allows the second body part 221 to be separated from the second connecting part 224.

[0063] Specifically, the housing 11 is also open to the front, so that the blade assembly 20 can extend forwardly out of the housing 11. The first body portion 211 of the first blade 21 is located outside the housing 11, and the first body portion 211 and the first blade tooth portion 212 together extend substantially in a first plane parallel to the first straight line 101. A portion of the first connecting portion 214 is located inside the housing 11, and another portion of the first connecting portion 214 is located outside the housing 11. That is, the first connecting portion 214 is at least partially located inside the housing 11, and the first connecting portion 214 also extends forwardly out of the housing 11, so that the first connecting portion 214 and the first body portion 211 can be detachably connected outside the housing 11. That is, the connection between the first body portion 211 and the first connecting portion 214 is located outside the housing 11. The first connecting portion 214 also extends substantially in a second plane parallel to the first straight line 101, and the first plane and the second plane are parallel to each other but do not coincide, that is, the first body portion 211 and the first connecting portion 214 have a height difference in the height direction. In this way, in the present embodiment, the first connecting portion 214 and the first body portion 211 can be detachably connected in a direction perpendicular to the first straight line 101, that is, the first connecting portion 214 and the first body portion 211 are detachably connected in the height direction. In this way, the first body portion 211 can be separated downwardly from the first connecting portion 214. Specifically, in the present embodiment, the first connecting portion 214 is formed with a first connecting hole 214a extending therethrough in the height direction, the first body portion 211 is formed with a first matching hole 211a extending therethrough in the height direction, and the blade assembly 20 further comprises a first connecting piece 215 sequentially passing through the first connecting hole 214a and the first matching hole 211a in the height direction, and the first connecting piece 215 can be a pin. In the present embodiment, the first connecting piece 215 is specifically a rivet, which is in interference fit with the first connecting hole 214a and is also in clearance fit with the first matching hole 211a. Of course, the rivet can also be in interference fit with the first matching hole 211a and in clearance fit with the first connecting hole 214a. In this way, when it is necessary to separate the first body portion 211 from the first connecting portion 214, the portion where the first body portion 211 and the first connecting portion 214 are connected can be lifted upwardly, so that the first body portion 211 can be separated downwardly from the first connecting portion 214. In the present embodiment, the first driving portion 213 and the first connecting portion 214 are formed by two different parts, and the first driving portion 213 and the first connecting portion 214 are formed separately and are fixedly connected. Of course, it can be understood that in other embodiments, the first driving portion 213 and the first connecting portion 214 can be integrally formed by one part. Alternatively, in other embodiments, the first driving portion 213 and the first connecting portion 214 can be movably connected, so that the first driving portion 213 can swing relative to the first connecting portion 214.It can be understood that the operator can turn over the trimmer 100 when disassembling the blade assembly 20, that is, the maintenance cover 113 at the lower part of the trimmer 100 faces upward, at this time, correspondingly, the operator can need to lift the first body part 211 upward to make it separate from the first connecting part 214. In the embodiment, a more wear-resistant annular part is further arranged in the first matching hole 211a, the annular part is detachably arranged in the first matching hole, and the annular part is specifically a first bushing 211b, and the wear resistance of the first bushing 211b is greater than that of the first matching hole 211a. It can be understood that the first bushing 211b can also be arranged in the first connecting hole 214a when the rivet is in interference fit with the first matching hole 211a. In addition, in other embodiments, the first connecting part 215 can also be integrally formed with the first body part 211 or the first connecting part 214, for example, the first body part 211 can also be integrally formed with a protruding structure, the first connecting part 214 is formed with a groove or a hole capable of embedding the protruding structure; or the protruding structure can also be formed on the first connecting part 214, and the first body part 211 is formed with a groove or a hole capable of embedding the protruding structure.

[0064] The second body portion 221 of the second blade 22 is located outside the casing 11, and the second body portion 221 and the second blade portion 222 extend substantially in a third plane parallel to the second straight line 102. A part of the second connecting portion 224 is located inside the casing 11 and another part is located outside the casing 11. That is, the second connecting portion 224 is at least partially located inside the casing 11, and the second connecting portion 224 further extends forwardly outside the casing 11, so that the second connecting portion 224 and the second body portion 221 are detachably connected outside the casing 11. That is, the connection between the second body portion 221 and the second connecting portion 224 is located outside the casing 11. The second connecting portion 224 also extends substantially in a fourth plane parallel to the second straight line 102, and the fourth plane and the third plane are parallel to each other and do not coincide, that is, the second body portion 221 and the second connecting portion 224 have a height difference in the height direction. In this way, in the present embodiment, the second connecting portion 224 and the second body portion 221 are detachably connected in a direction perpendicular to the second straight line 102, that is, the second connecting portion 224 and the second body portion 221 are detachably connected in the height direction. In this way, the second body portion 221 can be separated downwardly from the second connecting portion 224. Specifically, in the present embodiment, the second connecting portion 224 is formed with a second connecting hole 224a extending therethrough in the height direction, the second body portion 221 is formed with a second matching hole 221a extending therethrough in the height direction, and the blade assembly 20 further comprises a second connecting piece 225 sequentially passing through the second connecting hole 224a and the second matching hole 221a in the height direction, and the second connecting piece 225 can also be a pin. In the present embodiment, the second connecting piece 225 is specifically a rivet, which is in interference fit with the second connecting hole 224a and is in clearance fit with the second matching hole 221a. Of course, the rivet can also be in interference fit with the second matching hole 221a and in clearance fit with the second connecting hole 224a. In this way, when it is necessary to separate the second body portion 221 and the second connecting portion 224, the second body portion 221 can be separated downwardly from the second connecting portion 224 by pushing the part where the second body portion 221 and the second connecting portion 224 are connected downwardly. In the present embodiment, the second driving portion 223 and the second connecting portion 224 are formed by two different parts, and the second driving portion 223 and the second connecting portion 224 are separately formed and are fixedly connected. Of course, it can be understood that, in other embodiments, the second driving portion 223 and the second connecting portion 224 can also be integrally formed by one part. Alternatively, in other embodiments, the second driving portion 223 and the second connecting portion 224 can also be movably connected, so that the second driving portion 223 swings relative to the second connecting portion 224.It can be understood that the operator may turn over the trimmer 100 when disassembling the blade assembly 20, that is, the lower maintenance cover 113 of the trimmer 100 is upward, at this time, the operator may need to lift the second body part 221 upward to make it separate from the second connecting part 224. In the embodiment, a more wear-resistant annular part is also arranged in the second matching hole 221a, which is specifically a second bushing 221b, and the wear resistance of the second bushing 221b is greater than that of the hole wall of the second matching hole 221a. In addition, in other embodiments, the second connecting part 225 can also be integrally formed with the second connecting part 224 or the second body part 221, for example, the second body part 221 can also be integrally formed with a protruding structure, and the second connecting part 224 is formed with a groove or a hole capable of embedding the protruding structure; or the protruding structure can also be formed on the second connecting part 224, and the second body part 221 is formed with a groove or a hole capable of embedding the protruding structure.

[0065] In the embodiment, the height difference exists between the first body part 211 and the first connecting part 214 at the connecting position, on the one hand, it makes the structure of the detachable connection of the first body part 211 and the first connecting part 214 simpler, and it is easier to realize the detachable connection between the first body part 211 and the first connecting part 214; on the other hand, the first body part 211 and the first connecting part 214 are superimposed on each other, so that the thickness of the whole formed by the first body part 211 and the first connecting part 214 is thicker at the connecting position, thereby improving the connection strength, and also making the first blade 21 more wear-resistant; moreover, because the height difference exists between the first body part 211 and the first connecting part 214 at the connecting position, the detachable connection of the first body part 211 and the first connecting part 214 can be realized by inserting the pin into the first matching hole 211a, thereby facilitating the reduction of the matching gap at the connecting position, so that the noise and vibration at the connecting position can be obviously improved. In summary, the connection with the height difference between the first body part 211 and the first connecting part 214 can thicken the matching surface at the connecting position, which has great benefits in improving the connection strength and wear resistance. In addition, the connection with the height difference facilitates the connection mode of the pin and the hole, which is convenient for realizing the precise matching with high dimensional accuracy, and the precise matching helps to reduce the matching gap at the connecting position, so that the noise and vibration at the connecting position have great advantages.

[0066] In the embodiment, in the first straight line direction, the connecting positions of the first body part 211 and the first connecting part 214 and the second body part and the second connecting part are spaced apart by a certain distance, so that the structure of the blade assembly is more reasonable, and the vibration effect

[0067] The limiting member 23 is used to prevent the first body part 211 from being separated from the first connecting part 214. Specifically, the direction in which the first body part 211 is separated from the first connecting part 214 is defined as a first direction, the limiting member 23 is a pressing plate capable of preventing the first body part 211 from being separated from the first connecting part 214 along the first direction, the first body part 211 is arranged between the pressing plate and the first connecting part 214, the first direction is perpendicular to the first straight line 101, and in fact, the first direction is the height direction, so that the limiting member 23 presses the first body part 211 to the first connecting part 214 along the direction perpendicular to the first straight line 101. Of course, it can be understood that the limiting member 23 can also press the first body part 211 to the first connecting part 214 along the direction obliquely intersecting with the first straight line 101. The first blade 21 is arranged on the lower side of the second blade 22, and the limiting member 23 prevents the first body part 211 from being separated downward from the first connecting part 214. Of course, it can be understood that in other embodiments, the positions of the first connecting part and the first body part can also be interchanged in the up-down direction, that is, the first connecting part can also be arranged between the pressing plate and the first body part, and at this time, the limiting member presses the first connecting part to the first body part along the direction perpendicular to the first straight line or along the direction obliquely intersecting with the first straight line.

[0068] The limiting member 23 extends along a direction parallel to the first straight line 101, and is arranged on the lower side of the first blade 21 to abut against the first blade 21, so as to avoid the first body part 211 from being separated from the first connecting part 214. The limiting member 23 is partially arranged in the casing 11, and further extends forwardly out of the casing 11. The blade assembly 20 further comprises a support 24 for supporting the first blade 21 and the second blade 22, and the limiting member 23 is mounted to the support 24. The blade assembly 20 further comprises a fastener for positioning the limiting member 23 in the locked state, which is specifically a first type of screw 25, and the first type of screw 25 fixes the limiting member 23 to the support 24. When the first type of screw 25 is loosened or removed by the operator, the operator can pull out the limiting member 23 forwardly, so that the limiting member 23 is switched to the unlocked state to release the restriction on the first body part 211 and the first connecting part 214, and at this time, the operator can separate the first body part 211 from the first connecting part 214. In this embodiment, the limiting member 23 is partially arranged in the casing 11 and partially extends out of the casing 11, and the part of the limiting member 23 located out of the casing 11 can be defined as an operating part 231, which can be operated by the user to pull out the limiting member 23 without disassembling the casing 11. In this embodiment, the first type of screw 25 is arranged out of the casing 11, so that the operator can disassemble the first body part 211 in the blade assembly 20 without disassembling the maintenance cover 113 or opening the casing 11, thereby making the use of the operator more convenient. In this embodiment, the number of the first type of screw 25 is one, and it can be understood that the number of the first type of screw 25 is not limited to one, and can be two. In order to disassemble more conveniently, the number of the first type of screw 25 can be limited to less than three. In this way, when the user needs to replace the first body part 211 and the second body part 221, the user only needs to disassemble one or two screws, thereby improving the convenience of operation.

[0069] More specifically, in this embodiment, the length of the first body part 211 of the first blade 21 arranged on the lower side is greater than the length of the second body part 221 of the second blade 22 arranged on the upper side, and the length of the first connecting part 214 is less than the length of the second connecting part 224, so that the connecting part between the first connecting part 214 and the first body part 211 is located on the rear side of the connecting part between the second connecting part 224 and the second body part 221. The first type of screw 25 sequentially penetrates through the limiting member 23, the first body part 211 and the second connecting part 224 along a third straight line 104 perpendicular to the first straight line 101, and then the limiting member 23, the first blade 21 and the second blade 22 are mounted to the support 24.

[0070] We know that the length of the first body part 211 in the direction of the first straight line 101 is relatively long, and the length of the second body part 221 in the direction of the second straight line 102 is also relatively long, because in order to position the first body part 211 and the second body part 221 in the height direction, the blade assembly 20 further comprises a fastener for positioning the first body part 211 and the second body part 221 to the support 24, which is specifically the second type of screw 26. The second type of screw 26 sequentially penetrates the first body part 211 and the second body part 221 in the direction of the fourth straight line 105 perpendicular to the first straight line 101, so as to avoid the first body part 211 and the second body part 221 being attached in the height direction to improve the cutting capacity, and also to avoid the first body part 211 and the second body part 221 from shaking. The number of the second type of screw 26 is multiple, for example, in the embodiment, the number of the second type of screw 26 is 7. The second type of screw 26 does not penetrate the limiting piece 23, so that the second type of screw 26 can position the first body part 211 and the second body part 221 while not limiting the limiting piece 23.

[0071] Specifically, the first body portion 211 is formed with a first mounting hole 211c through which the second type of screw 26 is passed to mount the first body portion 211 to the holder 24. The first mounting hole 211c includes a first sliding portion 211d that allows the second type of screw 26 to slide along the direction of the first straight line 101 and prevents the second type of screw 26 from passing through, and a first through-hole portion 211e that allows the first body portion 211 to be detached from the second type of screw 26 in the height direction. Specifically, the second type of screw 26 includes a cylindrical shank portion centered on the fourth straight line 105 and a head portion provided at one end of the shank portion, the head portion having a radial dimension that is larger than the radial dimension of the shank portion. The first sliding portion 211d is an elongated hole extending in the direction of the first straight line 101, and the dimension of the first sliding portion 211d in the width direction is larger than the dimension of the shank portion of the second type of screw 26 in the width direction and smaller than the dimension of the head portion in the width direction. The second type of screw 26 can also be connected to a washer to prevent the first body portion 211 from being detached from the second type of screw 26. The first through-hole portion 211e is provided at one end of the first sliding portion 211d, and the dimension of the first through-hole portion 211e in the width direction is larger than the dimension of the head portion or the washer in the width direction. The maximum dimension of the first through-hole portion 211e in the width direction is also larger than the maximum dimension of the first sliding portion 211d in the width direction. Thus, when the second type of screw 26 is passed through the first mounting hole 211c and connected to the holder 24, the first body portion 211 cannot be detached from the second type of screw 26 in the height direction when the second type of screw 26 cooperates with the first sliding portion 211d, but the first body portion 211 can be detached from the second type of screw 26 in the height direction when the first body portion 211 is slid in the direction of the first straight line 101 to the first through-hole portion 211e cooperating with the second type of screw 26. In the present embodiment, the first through-hole portion 211e is a circular hole, and the diameter of the first through-hole portion 211e is larger than the maximum dimension of the first sliding portion 211d in the width direction. In this way, the first body portion 211 has at least a first position and a second position relative to the second type of screw 26 in the direction of the first straight line 101, the second type of screw 26 prevents the first body portion 211 from being detached from the holder 24 when the first body portion 211 is in the first position, and the second type of screw 26 allows the first body portion 211 to be detached from the holder 24 when the first body portion 211 is in the second position. In the present embodiment, in order to improve the strength of the blade assembly 20, the center of the circular hole is not on the first straight line 101, and the circular hole is not symmetrical about the first straight line 101. With respect to the first blade tooth portion 212 on the left side of the first body portion 211, the circular hole is aligned with the first blade tooth portion 212 on the left side, and with respect to the first blade tooth portion 212 on the right side, the circular hole is provided between the two first blade tooth portions 212 on the right side. At this time, in order to avoid the part of the first body portion 211 on the right side of the circular hole being insufficient in strength, the circular hole is made to be offset to the left, i.e., the center or the center of the circular hole is provided on the left side of the first straight line 101.

[0072] The second body portion 221 is formed with a second mounting hole 221c through which the second type of screw 26 is passed to mount the second body portion 221 to the bracket 24. The second mounting hole 221c includes a second sliding portion 221d that allows the second type of screw 26 to slide in the direction parallel to the second straight line 102 and prevents the second type of screw 26 from passing through, and a second through-hole portion 221e that allows the second body portion 221 to disengage from the second type of screw 26 in the height direction. The second sliding portion 221d is an elongated hole extending in the direction of the second straight line 102, and the dimension of the second sliding portion 221d in the width direction is greater than the dimension of the shank portion of the second type of screw 26 in the width direction and less than the dimension of the head portion or the washer in the width direction. The second through-hole portion 221e is provided at one end of the second sliding portion 221d, and the dimension of the second through-hole portion 221e in the width direction is greater than the dimension of the head portion or the washer in the width direction. The maximum dimension of the second through-hole portion 221e in the width direction is also greater than the maximum dimension of the second sliding portion 221d in the width direction. Thus, when the second type of screw 26 is passed through the second mounting hole 221c and connected to the bracket 24, the second body portion 221 cannot disengage from the second type of screw 26 in the height direction when the second type of screw 26 cooperates with the second sliding portion 221d, and the second body portion 221 can disengage from the second type of screw 26 in the height direction when the second body portion 221 is slid in the direction of the second straight line 102 to the second through-hole portion 221e cooperating with the second type of screw 26. In the present embodiment, the second through-hole portion 221e is a circular hole, and the diameter of the second through-hole portion 221e is greater than the maximum dimension of the second sliding portion 221d in the width direction. In this way, the second body portion 221 has at least a third position and a fourth position relative to the second type of screw 26 in the direction of the second straight line 102, the second type of screw 26 prevents the second body portion 221 from disengaging from the bracket 24 when the second body portion 221 is in the third position, and the second type of screw 26 allows the second body portion 221 to disengage from the bracket 24 when the second body portion 221 is in the fourth position.

[0073] In the present embodiment, in order to improve the service life of the pruning machine 100 and reduce the use cost of the pruning machine 100, the first body portion 211 and the second body portion 221 are made of a first material, and the first connecting portion 214 and the second connecting portion 224 are made of a second material different from the first material, wherein the second material is more wear-resistant and has higher hardness than the first material.

[0074] As Figure 8 and Figure 12As shown, the support 24 comprises a first support portion 241 for supporting the first connecting portion 214 and a second support portion 242 for supporting the first body portion 211. Considering that the first connecting portion 214 and the first body portion 211 have a height difference in the height direction, the first support portion 241 and the second support portion 242 also have a height difference in the height direction, so as to better support the first blade 21 and the second blade 22 and improve the stability and reliability of the blade assembly 20. In this way, the first type of screw 25 can pass through the limiting piece 23 and the first support portion 241 to fix the limiting piece 23 to the first support portion 241, and the second type of screw 26 can pass through the first mounting hole 211c, the second mounting hole 221c and the second support portion 242 to fix the first body portion 211 and the second body portion 221 to the second support portion 242.

[0075] The specific steps of disassembling the first body portion 211 and the second body portion 221 are as follows:

[0076] As shown in Figure 13 and Figure 14 , the operator first disassembles the first type of screw 25; then, as shown in Figure 14 and Figure 15 , the operator pulls out the limiting piece 23 outwardly so that the limiting piece 23 is in an unlocked state; then, as shown in Figure 13 and Figure 16 , the limiting piece 23 is disassembled; then, as shown in Figure 13 , Figure 16 and Figure 17 , the connection between the first body portion 211 and the first connecting portion 214 is pushed downwardly so that the first body portion 211 is separated downwardly from the first connecting portion 214, and the first body portion 211 is pushed forwardly so that the first body portion 211 moves forwardly to a position where the second type of screw 26 cooperates with the first through hole portion 211e, at which time the first body portion 211 is disassembled; then, as shown in Figure 13 , Figure 18 and Figure 19 , the connection between the second body portion 221 and the second connecting portion 224 is pushed downwardly so that the second body portion 221 is separated downwardly from the second connecting portion 224, and the second body portion 221 is pushed forwardly so that the second body portion 221 moves forwardly to a position where the second type of screw 26 cooperates with the second through hole portion 221e; then, as shown in Figure 13 , Figure 19 and Figure 20 , at this time, the second body portion 221 can be disassembled.

[0077] In this embodiment, the operator only needs to disassemble one first type of screw 25 during the replacement of the first body portion 211 and the second body portion 221, without disassembling the maintenance cover 113, so that the entire disassembly process can be completed in a few minutes, improving the work efficiency.

[0078] In the embodiment, the first type of screw 25 is disassembled to disassemble the limiting member 23. In other embodiments, a hole similar to the first mounting hole 211c can be provided on the limiting member 23, so that the limiting member 23 can be disassembled even if the first type of screw 25 is not disassembled. In other embodiments, the limiting member 23 is not fixed by a screw, but is fixed by a buckle or the like.

[0079] In the embodiment, referring to Figure 10 The first body part 211 is guided by the guide part 211f to move from the position where the first sliding part 211d contacts the second type of screw 26 to the position where the first through hole part 211e contacts the second type of screw 26, and vice versa. In the embodiment, the guide part 211f is chamfered, and further rounded. The first mounting hole 211c is provided in a plurality of numbers, and the guide parts 211f of two adjacent first mounting holes 211c are rounded with different radii. In this way, when the first body part 211 is installed, the guide part 211f can guide the plurality of second type of screws 26 to engage with the corresponding first mounting holes 211c in sequence, that is, the first second type of screw 26 engages with the corresponding first mounting hole 211c, then the second second type of screw 26 engages with the corresponding first mounting hole 211c, and then the third second type of screw 26 engages with the corresponding first mounting hole 211c. When the first body part 211 is disassembled, the guide part 211f can guide the plurality of second type of screws 26 to disengage from the corresponding first mounting holes 211c in sequence, so as to reduce the friction of the first body part 211 during disassembly or installation, and improve the performance of the operation. The engagement of the second type of screw 26 with the first mounting hole 211c refers to the movement of the first body part 211 to the position where the first through hole part 211e contacts the second type of screw 26, and the disengagement of the second type of screw 26 from the first mounting hole 211c refers to the movement of the first body part 211 to the position where the first sliding part 211d contacts the second type of screw 26.

[0080] Referring to Figure 11A guide portion 221f is also provided at the connection between the second through hole portion 221e and the second sliding portion 221d. The guide portion 221f can guide the second body portion 221 to move from the position where the second sliding portion 221d contacts the second type of screw 26 to the position where the second through hole portion 221e contacts the second type of screw 26. The guide portion 221f can also guide the second body portion 221 to move from the position where the second through hole portion 221e contacts the second type of screw 26 to the position where the second sliding portion 221d contacts the second type of screw 26. In this embodiment, the guide portion 221f is chamfered, and further, it is rounded. There are multiple second mounting holes 221c, and the guide portions 221f of two adjacent second mounting holes 221c are rounded with different rounded radii. Thus, when the second body part 221 is installed, the guide part 221f can guide multiple second-type screws 26 to engage with their corresponding second mounting holes 221c sequentially; and when the second body part 221 is disassembled, the guide part 221f can guide multiple second-type screws 26 to disengage from their corresponding second mounting holes 221c sequentially, thereby reducing the friction experienced by the second body part 221 during disassembly or installation and improving operational performance. Engaging the second-type screws 26 with the second mounting holes 221c means that the second body part 221 moves to the position where the second through hole part 221e contacts the second-type screws 26, while disengaging the second-type screws 26 from the second mounting holes 221c means that the second body part 221 moves to the position where the second sliding part 221d contacts the second-type screws 26.

[0081] The present invention also proposes a second embodiment of a pruning machine, which has the same components as the pruning machine 100 in the first embodiment: a housing, a prime mover, and a transmission device. For example... Figure 21 to Figure 23 As shown, the pruning machine of this embodiment also includes a blade assembly 40, which includes a first blade 41 and a second blade 42. The difference between the first blade 41 in this embodiment and the first blade 21 in the first embodiment lies only in the structure of the first mounting hole 411c. Similarly, the difference between the second blade 42 in this embodiment and the second blade 22 in the first embodiment lies only in the structure of the second mounting hole 421c. The blade assembly 40 also includes a bracket 44 with a structure substantially the same as that in the first embodiment. All structures in the pruning machine 100 of the first embodiment that are compatible with this embodiment can be applied to this embodiment. The following only describes the differences between this embodiment and the first embodiment.

[0082] In this embodiment, the pruning machine also includes a limiting member 43 for preventing the first body portion 411 from disengaging from the first connecting portion 414. In this embodiment, the blade assembly 40 also includes a pressure plate 47 for pressing the first body portion 411 and the second body portion 421 onto the bracket 44. The pressure plate 47 is provided with a pressing hole 471, which has a first pressing portion 471a and a second pressing portion 471b with different dimensions in the width direction. The maximum dimension of the first pressing portion 471a in the width direction is smaller than the maximum dimension of the second pressing portion 471b in the width direction. A first mounting hole 411c extending along a first straight line direction is formed on the first body portion 411, and a second mounting hole 421c extending along a second straight line direction is formed on the second body portion 421. Both the first mounting hole 411c and the second mounting hole 421c are elongated holes. The second type of screw 46 passes sequentially through the press-fit hole 471, the first mounting hole 411c, and the second mounting hole 421c to mount the first body part 411 and the second body part 421 to the bracket 44. In this way, on the one hand, the operator can disassemble the first body part 411 and the second body part 421 without moving them back and forth, making the operation simpler; on the other hand, the first body part 411 and the second body part 421 have a simple structure and high strength.

[0083] like Figure 23 and 24 As shown, a guide portion 471c is also provided at the connection between the first pressing part 471a and the second pressing part 471b. The guide portion 471c can guide the second type of screw 46 to move from the first pressing part 471a to the second pressing part 471b, and the guide portion 471c can also guide the second type of screw 46 to move from the second pressing part 471b to the first pressing part 471a. In this embodiment, the guide portion 471c is a bevel. There are multiple pressing holes 471, and the guide portions 471c of two adjacent pressing holes 471 are bevels with different inclinations. In this way, when the pressure plate 47 is installed, the guide portion 471c can guide multiple second type of screws 46 to engage with their corresponding second pressing parts 471b in sequence; and when the pressure plate 47 is disassembled, the guide portion 471c can guide multiple second type of screws 46 to disengage from their corresponding second pressing parts 471b in sequence, thereby reducing the friction force on the pressure plate 47 during disassembly or installation and improving the performance of operation. The engagement of the second type of screw 46 with the second pressing part 471b means that the pressure plate 47 moves to the position where the second pressing part 471b contacts the second type of screw 46, while the disengagement of the second type of screw 46 from the second pressing part 471b means that the pressure plate 47 moves to the position where the first pressing part 471a contacts the second type of screw 46.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A pruning machine, comprising: a blade assembly including a first blade and a second blade that perform a cutting function when in relative motion; a housing formed with a receiving cavity; a prime mover disposed in the receiving cavity; a transmission device for transmitting power between the prime mover and the blade assembly to drive the first blade and the second blade to produce relative motion; the first blade including: a first body portion extending in a first linear direction; a first blade tooth portion for cutting vegetation; the second blade including: a second body portion extending in a second linear direction; a second blade tooth portion for cutting vegetation; characterized in that: the first blade further includes: a first connection group including a first driving portion connected with the transmission device to introduce driving force output by the transmission device into the first blade, and a first connecting portion connected with the first body portion to cause the first body portion to move with the first driving portion; the second blade further includes: a second connection group including a second driving portion connected with the transmission device to introduce driving force output by the transmission device into the second blade, and a second connecting portion connected with the second body portion to cause the second body portion to move with the second driving portion; wherein the first connecting portion and the first body portion constitute detachable connection, and the second connecting portion and the second body portion constitute detachable connection; at least a portion of the first connecting portion is located outside the housing; a connection between the first body portion and the first connecting portion is located outside the housing, and a connection between the second body portion and the second connecting portion is located outside the housing; the first connecting portion is formed with a first connecting hole that penetrates the first connecting portion in a height direction, and the first body portion is formed with a first matching hole that penetrates the first body portion in the height direction; a ratio of a dimension of the portion of the first connecting portion that extends outside the housing in the first linear direction to a dimension of the first body portion in the first linear direction is greater than 0.02 and less than or equal to 0.

25.

2. The pruning machine according to claim 1, characterized in that: the pruning machine further includes a limiting member capable of limiting the first body portion from being detached from the first connecting portion and capable of limiting the second body portion from being detached from the second connecting portion, the limiting member having a limiting state and an unlocking state; when the limiting member is in the limiting state, the limiting member prevents the first body portion from being detached from the first connecting portion and prevents the second body portion from being detached from the second connecting portion; when the limiting member is in the unlocking state, the limiting member allows the first body portion to be detached from the first connecting portion and allows the second body portion to be detached from the second connecting portion.

3. The pruning machine according to claim 1, characterized in that: The pruning machine further comprises a limiting member for limiting the first body part from being detached from the first connecting part, the limiting member having a limiting state for limiting the first body part from being detached from the first connecting part and an unlocking state for allowing the first body part to be detached from the first connecting part, the limiting member being at least partially located in the machine housing, and the limiting member further comprising an operating part which can be operated by the operator at least partially without opening the machine housing.

4. The pruning machine according to claim 1, wherein: the first body part and the first connecting part are detachably connected along a direction perpendicular to the first straight line; the second body part and the second connecting part are detachably connected along a direction perpendicular to the second straight line.

5. The pruning machine according to claim 1, wherein: the first body part extends in a first plane, the first connecting part extends in a second plane, and the first plane and the second plane are parallel and do not coincide; the second body part extends in a third plane, the second connecting part extends in a fourth plane, and the third plane and the fourth plane are parallel and do not coincide.

6. The pruning machine according to claim 1, wherein: a height difference exists between the first body part and the first connecting part at the connecting position, and a height difference exists between the second body part and the second connecting part at the connecting position.

7. The pruning machine according to claim 1, wherein: the first driving part and the first connecting part are integrally formed by one part; and the second driving part and the second connecting part are integrally formed by one part.

8. The pruning machine according to claim 1, wherein: the first driving part and the first connecting part are respectively formed by two different parts; and the second driving part and the second connecting part are respectively formed by two different parts.

9. The pruning machine according to claim 1, wherein: the first connecting part is formed with a connecting hole, and the first body part is formed with or connected with a connecting member capable of being inserted into the connecting hole.

10. The pruning machine according to claim 1, wherein: the first connecting part is formed with or connected with a connecting member, and the first body part is formed with a matching hole capable of being inserted by the connecting member.

11. The pruning machine according to claim 10, wherein: the pruning machine further comprises a limiting member for limiting the first body part from being detached from the first connecting part, the limiting member having a limiting state for limiting the first body part from being detached from the first connecting part and an unlocking state for allowing the first body part to be detached from the first connecting part, the limiting member being at least partially located outside the machine housing; and a first direction is defined as a direction in which the first body part is detached from the first connecting part. the first blade is arranged at a lower side of the second blade; the limiting member prevents the first body part from being detached from the first connecting part along the first direction, and the first direction is perpendicular to the first straight line.

12. The pruning machine according to claim 11, wherein: The trimmer further comprises a screw for positioning the limiting member in the locked state, the number of the screw being equal to or less than 2, and the screw being located outside the housing.

13. The trimmer according to claim 11, wherein: The trimmer further comprises a screw for positioning the limiting member in the locked state, the number of the screw being equal to or less than 2, and the screw being located outside the housing.

14. The trimmer according to claim 11, wherein: The trimmer further comprises: a first type of screw which passes through the limiting member in a direction perpendicular to the first straight line; a second type of screw which passes through the first blade and the second blade in a direction perpendicular to the first straight line and does not pass through the limiting member; The first body portion is formed with: a mounting hole through which the second type of screw passes, the mounting hole comprising a sliding portion which allows the second type of screw to slide in a direction parallel to the first straight line and prevents the second type of screw from passing through, and a through-hole portion which allows the first body portion to be detached from the second type of screw in a direction perpendicular to the first straight line.

15. The trimmer according to claim 14, wherein: The maximum dimension of the sliding portion in the width direction is smaller than the maximum dimension of the through-hole portion in the width direction.

16. The trimmer according to claim 15, wherein: The mounting hole is further formed with a guide portion which is provided at the connection between the sliding portion and the through-hole portion; when the first body portion is mounted, the guide portion guides the plurality of second type of screws to engage with the mounting holes corresponding thereto in sequence; when the first body portion is detached, the guide portion guides the plurality of second type of screws to disengage from the mounting holes corresponding thereto in sequence.

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