Cam structure and pruning machine with it

Abstract

This utility model provides a cam structure and a pruning machine having the same, comprising: a main body rotatably disposed along a preset axis; the main body including two opposing main surfaces; an eccentric part disposed on at least one of the two main surfaces and moving synchronously with the main body; and a channel penetrating the main body and the eccentric part along the thickness direction of the main body. This utility model solves the problem of uneven lubricant distribution in existing cam structures.

Description

Technical Field

[0001] This utility model relates to the technical field of pruning equipment, and more specifically, to a cam structure and a pruning machine having the same. Background Technology

[0002] Currently, in the design and manufacturing of rotating components, lubrication is crucial for the normal operation and extended service life of the components. The cam component in a pruning machine is a key component for power transmission and control of shearing motion. The cam component is constantly under high-speed rotation and frequent reciprocating motion, bearing significant loads and friction.

[0003] However, the existing structural design of cam components often does not fully consider the optimization of lubrication channels, resulting in uneven distribution of lubricating oil on the surface of the cam component, which can easily lead to jamming during operation and seriously affect the performance and reliability of the tool. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a cam structure and a pruning machine having the same.

[0005] To achieve the above objectives, the technical solution provided by an embodiment of this utility model is as follows:

[0006] A cam structure includes: a main body rotatably disposed along a predetermined axis; the main body includes two opposing main surfaces; an eccentric part disposed on at least one of the two main surfaces and moving synchronously with the main body; and a channel penetrating the main body and the eccentric part along the thickness direction of the main body. The channel penetrating the main body and the eccentric part provides a direct flow path for the lubricating medium, ensuring uniform lubrication at different parts of the cam structure.

[0007] Furthermore, each main body surface is provided with at least one eccentric part; there are at least two channels, one of which penetrates the main body and one of the eccentric parts, and the other channel penetrates the main body and the other eccentric part, thereby enhancing the balance during rotation in the thickness direction of the main body.

[0008] Furthermore, at least one of the two eccentric portions is symmetrically arranged with respect to a first preset plane, which extends along the thickness direction of the main body, and the center of gravity of the main body is located on the first preset plane; at least one of the two channels is symmetrically arranged with respect to the first preset plane. This symmetrical arrangement of the eccentric portions and channels improves the balance of the center of gravity during the rotation of the cam structure, thereby reducing vibration and noise.

[0009] Furthermore, the channel includes a first channel segment located on the main body and a second channel segment located on the eccentric portion; wherein: along the thickness direction of the main body, the cross-sectional area of ​​the first channel segment is smaller than the cross-sectional area of ​​the second channel segment; or, along the thickness direction of the main body, the cross-section of the first channel segment is the same as the cross-section of the second channel segment. When the cross-sectional area of ​​the first channel segment is smaller than the cross-sectional area of ​​the second channel segment, the oil storage capacity can be increased through the second channel segment; when the cross-section of the first channel segment is the same as the cross-section of the second channel segment, the machining of the cam structure can be facilitated.

[0010] Furthermore, the cam structure also includes a rotating shaft; the rotating shaft passes through the main body and the eccentric portion; wherein, the second channel section includes a first channel wall and a second channel wall connected to each other, the first channel wall being located on the side of the second channel wall closer to the rotating shaft, the first channel wall extending along the outer edge of the rotating shaft, and the second channel wall extending along the outer edge of the eccentric portion. The arrangement of the channel walls in the second channel section further improves the weight reduction of the cam structure, making the structural layout of the cam structure more compact.

[0011] Furthermore, the first channel segment is a circular hole with a diameter of d, where 3mm ≤ d ≤ 30mm; and / or, the depth of the first channel segment in the thickness direction of the main body is H1, where 3mm ≤ H1 ≤ 15mm; the outer edge of the eccentric part is circular with a diameter of D; the first channel segment is a circular hole with a diameter of d, where 1 ≤ D / d ≤ 10; and / or, the depth of the second channel segment in the thickness direction of the main body is H2, where 3mm ≤ H2 ≤ 10mm. This allows for weight reduction of the cam structure while avoiding excessive weakening of the structural strength of the main body and the eccentric part.

[0012] Furthermore, there are multiple channels, which are spaced apart from each other; there are at least two eccentric parts, one and the other of which are respectively located on two main body surfaces; the multiple channels form a channel group; there are at least two channel groups, one and the other of which are symmetrically arranged with respect to the first preset plane; one of the channel groups penetrates the main body and one of the eccentric parts, and the other channel group penetrates the main body and the other of the eccentric parts. This multi-channel symmetrical layout further reduces weight and material consumption by increasing the number of channels, and reduces the inertia of the cam structure during rotation.

[0013] Furthermore, the cam structure also includes weight-reducing holes, which are disposed on and penetrate the main body. There are at least two weight-reducing holes, and one and the other are symmetrically arranged along a second preset plane. The second preset plane extends along the thickness direction of the main body, and the center of gravity of the main body is located on the second preset plane. The second preset plane and the first preset plane are perpendicular to each other. This symmetrical arrangement of the weight-reducing holes further reduces weight by opening holes in the main body, while ensuring the overall structural balance through symmetrical distribution.

[0014] Furthermore, there are multiple weight-reducing holes, which are arranged at intervals along the periphery of the main body to form weight-reducing hole groups; there are at least two weight-reducing hole groups, and one of the at least two weight-reducing hole groups and the other weight-reducing hole group are symmetrically arranged along a second preset plane; and / or, each weight-reducing hole is a circular hole, and the maximum diameter of each weight-reducing hole is less than or equal to 20 mm. The interval arrangement of multiple weight-reducing holes can further reduce the weight of the cam component while ensuring structural rigidity. Designing the weight-reducing holes as circular and limiting their maximum diameter helps to achieve weight reduction while ensuring hole strength.

[0015] This utility model also provides a pruning machine, including the above-mentioned cam structure.

[0016] This invention offers the following advantages: By providing channels that penetrate the main body and the eccentric portion along the thickness direction of the main body, a direct and efficient lubrication pathway is achieved for the cam structure. Lubricating oil can circulate through these channels on the upper and lower surfaces of the eccentric portion, ensuring adequate lubrication of critical parts, reducing friction and wear, and extending the service life of the components. Furthermore, the channel design not only optimizes the lubrication effect of the structure but also facilitates weight reduction, material consumption reduction, and cost reduction, achieving tool lightweighting. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a cam structure provided in a specific embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of a cam structure provided in a specific embodiment of this utility model;

[0020] Figure 3A top view of a cam structure provided in a specific embodiment of this utility model;

[0021] Figure 4 A partial structural schematic diagram of a pruning machine provided in another specific embodiment of this utility model;

[0022] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0023] The above figures include the following reference numerals:

[0024] 1. Main body; 11. Main body surface; 2. Eccentric part; 3. Channel; 31. First channel section; 32. Second channel section; 321. First channel wall; 322. Second channel wall; 4. First preset plane; 5. Rotation shaft; 51. Mounting hole; 6. Weight reduction hole; 61. Weight reduction hole group; 62. First weight reduction hole; 63. Second weight reduction hole; 64. Third weight reduction hole; 7. Second preset plane; 8. Pruning machine; 81. Blade. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In the description of the embodiments of this utility model, it should also be noted that the terms "first" and "second" used herein do not specifically refer to any order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] The technical solution of this utility model will now be described with reference to the accompanying drawings.

[0033] To address the problem of uneven lubricant distribution in existing cam structures, this invention provides a cam structure and a pruning machine incorporating it. The pruning machine 8 includes a cam structure mounted on its main body.

[0034] To achieve the above objectives, the technical solution provided by an embodiment of this utility model is as follows:

[0035] like Figures 1 to 5 As shown, this utility model provides a cam structure. Figure 1As shown, the cam structure is composed of multiple structures. The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a predetermined axis and is rotatably disposed along the predetermined axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1.

[0036] The cam structure provided by this invention, with its channel 3 penetrating the main body 1 and the eccentric part 2, provides a direct flow path for the lubricating medium, ensuring uniform lubrication at different parts of the cam structure. In particular, the channel 3 penetrating the eccentric part 2 is crucial because the eccentric part 2 is used to connect with the component to be installed, and dry friction easily occurs at the connection point. By having the channel 3 penetrate the eccentric part 2, the lubricating medium can flow up and down within the eccentric part 2, significantly improving lubrication efficiency, reducing wear, and extending the service life of the component. Furthermore, the channel 3 also contributes to weight reduction, improving the portability and operational flexibility of the overall tool while maintaining the mechanical properties of the cam structure. Therefore, the cam structure provided in this embodiment can solve the problem of uneven lubricant distribution in existing cam structures.

[0037] Specifically, such as Figure 5 As shown, the eccentric part 2 is used to connect with the blade assembly of the pruning machine 8. The blade assembly includes two blades 81. When the cam structure rotates, it drives the eccentric part 2 to rotate, thereby driving the two blades 81 to perform reciprocating cutting motions in opposite directions.

[0038] Specifically, such as Figure 1 As shown, the main body 1 has a disc-shaped structure, and the preset axis Z is the central axis of the main body 1. The preset axis Z passes through the center of gravity of the main body 1 and extends along the thickness direction of the main body 1.

[0039] Specifically, the eccentric part 2 is fixedly mounted on the main body part 1 and rotates together with the main body part 1 as it rotates.

[0040] In one specific embodiment, the eccentric part 2 is integrally disposed with the main body part 1.

[0041] In a specific embodiment not shown, the eccentric part 2 and the main body part 1 are manufactured separately and fixedly connected by welding.

[0042] In a specific embodiment not shown, the eccentric part 2 and the main body part 1 are manufactured separately and bonded together by an adhesive.

[0043] In a specific embodiment not shown, the eccentric portion 2 and the main body portion 1 are manufactured separately and fixedly connected by a keyway. A keyway is machined on one of the eccentric portion 2 and the main body portion 1, and a key is machined on the other. The fixed connection between the eccentric portion 2 and the main body portion 1 is achieved by the mutual interlocking of the key and the keyway.

[0044] In a specific embodiment not shown, the eccentric part 2 and the main body part 1 are manufactured separately and are fixedly connected by bolts.

[0045] In a specific embodiment not shown, the eccentric part 2 and the main body part 1 are manufactured separately and fixedly connected by pins.

[0046] Specifically, the cam structure also includes a rotating shaft 5. The rotating shaft 5 passes through the main body 1 and the eccentric part 2, and extends along the thickness direction of the main body 1. The central axis of the rotating shaft 5 coincides with the preset axis Z. The rotating shaft 5 is fixed relative to the main body 1 and the eccentric part 2, and the main body 1, the eccentric part 2, and the rotating shaft 5 rotate as a whole.

[0047] In one specific embodiment, the rotating shaft 5, the eccentric part 2, and the main body 1 are integrally arranged.

[0048] In a specific embodiment not shown, the rotating shaft 5, the eccentric portion 2, and the main body 1 are manufactured separately. The cam structure has a mounting hole 51 for mounting the rotating shaft 5, which extends through the main body 1 and the eccentric portion 2. The rotating shaft 5 passes through the mounting hole 51, and there is an interference fit between the rotating shaft 5 and the main body 1, and an interference fit between the rotating shaft 5 and the eccentric portion 2.

[0049] In a specific embodiment not shown, the rotating shaft 5, the eccentric portion 2, and the main body 1 are manufactured separately. The cam structure has a mounting hole 51 for mounting the rotating shaft 5, which extends through the main body 1 and the eccentric portion 2. Threads are provided on the inner wall of the mounting hole 51, and the rotating shaft 5 is threadedly connected to the main body 1 and to the eccentric portion 2.

[0050] In a specific embodiment not shown, the rotating shaft 5, the eccentric portion 2, and the main body 1 are manufactured separately. The cam structure has a mounting hole 51 for mounting the rotating shaft 5, which extends through the main body 1 and the eccentric portion 2. The rotating shaft 5 passes through the mounting hole 51 and is welded to the main body 1 and the eccentric portion 2.

[0051] In a specific embodiment not shown, the rotating shaft 5, the eccentric portion 2, and the main body 1 are manufactured separately. The cam structure has a mounting hole 51 for mounting the rotating shaft 5, which extends through the main body 1 and the eccentric portion 2. The rotating shaft 5 passes through the mounting hole 51, and is bonded to the main body 1 and the eccentric portion 2 with an adhesive.

[0052] In a specific embodiment not shown, the rotating shaft 5, the eccentric portion 2, and the main body 1 are manufactured separately. The cam structure has a mounting hole 51 for mounting the rotating shaft 5, which extends through the main body 1 and the eccentric portion 2. The rotating shaft 5 passes through the mounting hole 51, and is thermally connected to the main body 1 and the eccentric portion 2.

[0053] like Figure 1 and Figure 2 As shown in this application, each main surface 11 is provided with at least one eccentric part 2.

[0054] Specifically, each eccentric part 2 is attached to the corresponding main body surface 11.

[0055] Specifically, both the main body 1 and the eccentric part 2 are disc structures.

[0056] Specifically, there are at least two eccentric portions 2, with one eccentric portion 2 attached to one of the two main body surfaces 11 and the other eccentric portion 2 attached to the other of the two main body surfaces 11.

[0057] Specifically, at least one of the two eccentric parts 2 is connected to one blade 81 of the pruning machine 8, and the other eccentric part 2 is connected to the other blade 81 of the pruning machine 8. Through the rotation of the cam structure, the two blades 81 reciprocate in opposite directions, thereby achieving the cutting of the target object to be pruned.

[0058] Specifically, at least two eccentric portions 2 are symmetrically arranged with respect to a first preset plane 4, which extends along the thickness direction of the main body 1, and the center of gravity of the main body 1 is located on the first preset plane 4. In this way, the symmetrical arrangement of the eccentric portions 2 can effectively balance the centrifugal force generated during rotation, so that the center of gravity of the cam structure as a whole is always on the preset axis, ensuring the balance and stability of the center of gravity of the cam structure during rotation, reducing the shaking or vibration effect, and thus reducing noise.

[0059] Specifically, at least two eccentric portions 2 are symmetrically arranged with respect to a second preset plane 7, which extends along the thickness direction of the main body 1. The center of gravity of the main body 1 is located on the second preset plane 7, and the second preset plane 7 and the first preset plane 4 are perpendicular to each other. This further ensures the balance of the cam structure and reduces the vibration of the cam during rotation.

[0060] like Figures 1 to 3 As shown in this application, there are at least two channels 3. One of the at least two channels 3 penetrates the main body 1 and one of the at least two eccentric parts 2, while the other channel 3 penetrates the main body 1 and the other eccentric part 2. This arrangement, with the corresponding channels 3 and eccentric parts 2, ensures that each eccentric part 2 can have the lubricating medium flowing vertically through the vertically penetrating channels 3, thereby ensuring sufficient lubrication of the surface of each eccentric part 2.

[0061] Specifically, at least one of the two channels 3 and the other channel 3 are symmetrically arranged with respect to the first preset plane 4. This helps maintain the dynamic balance of the cam structure during rotation, avoids vibration caused by imbalance due to hole cutting, and reduces noise levels.

[0062] Specifically, at least one of the two channels 3 and the other channel 3 are symmetrically arranged with respect to the second preset plane 7, which extends along the thickness direction of the main body 1. The center of gravity of the main body 1 is located on the second preset plane 7, and the second preset plane 7 and the first preset plane 4 are perpendicular to each other. In this way, the center of gravity of the cam structure is further balanced, and the vibration of the cam during rotation is reduced.

[0063] In one specific embodiment, such as Figures 1 to 3 As shown, there are two eccentric portions 2. One of the eccentric portions 2 is attached to one of the two main body surfaces 11, and the other eccentric portion 2 is attached to the other of the two main body surfaces 11. There are two channels 3. One channel 3 passes through the main body 1 and one of the eccentric portions 2, and the other channel 3 passes through the main body 1 and the other eccentric portion 2. The two eccentric portions 2 and the corresponding channels 3 on the two eccentric portions 2 are symmetrical with respect to the first preset plane 4 and the second preset plane 7. In this way, not only are lubrication requirements met, but the goal of structural lightweighting is also achieved.

[0064] In a specific embodiment (not shown), there are two eccentric portions 2. One eccentric portion 2 is attached to one of the two main body surfaces 11, and the other eccentric portion 2 is attached to the other of the two main body surfaces 11. At least a portion of one eccentric portion 2 is arranged opposite to at least a portion of the other eccentric portion 2. There are two channels 3, both of which penetrate the main body 1 and the two eccentric portions 2. The two eccentric portions 2 and the two channels 3 are symmetrical with respect to the first preset plane 4 and the second preset plane 7.

[0065] In a specific embodiment (not shown), there are two main body portions 1 and two eccentric portions 2. One eccentric portion 2 is disposed on one main surface 11 of one main body portion 1, and the other eccentric portion 2 is disposed on one main surface 11 of another main body portion 1. The other main surfaces 11 of one main body portion 1 and the other main surface 11 of the other main body portion 1 are arranged opposite to each other. There are two channels 3. One channel 3 passes through one main body portion 1 and one eccentric portion 2, and the other channel 3 passes through the other main body portion 1 and the other eccentric portion 2. Both eccentric portions 2 and both channels 3 are symmetrical with respect to the first preset plane 4 and the second preset plane 7.

[0066] In a specific embodiment (not shown), there are two main body portions 1 and two eccentric portions 2. One eccentric portion 2 is disposed on one main surface 11 of one main body portion 1, and the other eccentric portion 2 is disposed on one main surface 11 of another main body portion 1. The other main surfaces 11 of one main body portion 1 and the other main surface 11 of the other main body portion 1 are disposed opposite to each other. At least a portion of one eccentric portion 2 is disposed opposite to at least a portion of the other eccentric portion 2. There are two channels 3, both of which penetrate both main body portions 1 and both eccentric portions 2. Both eccentric portions 2 and both channels 3 are symmetrical with respect to the first preset plane 4 and the second preset plane 7.

[0067] In a specific embodiment (not shown), there are multiple channels 3, which are spaced apart to form channel groups. There are at least two eccentric portions 2, one and the other of which are respectively disposed on two main body surfaces 11. There are at least two channel groups, one and the other of which are symmetrically arranged with respect to the first preset plane 4 and the second preset plane 7. One channel group penetrates the main body 1 and one of the at least two eccentric portions 2, while the other channel group penetrates the main body 1 and the other of the at least two eccentric portions 2. Thus, since each eccentric portion 2 has multiple channels 3, the effect of lubricating medium flowing through the eccentric portion 2 is further enhanced, thereby improving the uniformity of the lubricating medium distribution on the surface of the eccentric portion 2 and further reducing the weight of the cam structure.

[0068] Specifically, there are two channel groups, each including multiple channels 3 spaced apart from each other. There are two eccentric portions 2, one and the other respectively disposed on two main body surfaces 11. One channel group penetrates the main body 1 and one of the two eccentric portions 2, while the other channel group penetrates the main body 1 and the other eccentric portion 2. The two channel groups are symmetrically arranged with respect to the first preset plane 4 and the second preset plane 7.

[0069] In the different embodiments provided above, regardless of the number of main body 1, eccentric part 2 and channel 3, the channel 3 can pass through the corresponding main body 1 and eccentric part 2, so that the lubricating medium can flow up and down along the channel 3 in the cam structure, ensuring that the lubricating medium is evenly covered on the surface of the cam structure, thereby playing a lubricating role in reducing friction. In addition, the arrangement of channel 3 can also reduce the overall weight of the cam structure, reduce the material consumption of the cam structure, and realize the lightweight design of the cam structure.

[0070] like Figure 1 and Figure 2 As shown in this application, the channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric part 2.

[0071] In one specific embodiment, along the thickness direction of the main body 1, the cross-sectional area of ​​the first channel segment 31 is smaller than the cross-sectional area of ​​the second channel segment 32. This allows for an increase in the lubricant storage capacity of the eccentric portion 2 through the arrangement of the second channel segment 32, ensuring sufficient lubrication of the eccentric portion 2 and even the entire cam structure.

[0072] Specifically, the ratio of the cross-sectional area of ​​the second channel segment 32 to the cross-sectional area of ​​the first channel segment 31 is greater than or equal to 20.

[0073] In a specific embodiment not shown, the cross-section of the first channel segment 31 is the same as the cross-section of the second channel segment 32 along the thickness direction of the main body 1.

[0074] In this application, the cross-sectional area of ​​the first channel segment 31 remains constant along the thickness direction of the main body 1. This constant cross-sectional area better ensures that the flow rate and velocity of the lubricating medium through the first channel segment 31 remain consistent, guaranteeing a smooth flow of the lubricating medium.

[0075] In this application, the cross-section of the first channel segment 31 along the thickness direction of the main body 1 is centrally symmetrical. The centrally symmetrical design ensures a balanced material distribution around the channel 3, which helps to enhance the overall strength and rigidity of the structure, prevent deformation and cracks during rotation, and extend the equipment life.

[0076] In one specific embodiment, such as Figure 1 As shown, the first channel segment 31 has a circular cross-section in the thickness direction of the main body 1.

[0077] Specifically, such as Figure 2 As shown, the first channel segment 31 is a circular hole with a diameter of d, where 3mm ≤ d ≤ 30mm.

[0078] In one specific embodiment, d = 10 mm.

[0079] Specifically, such as Figure 2 As shown, the outer edge of the eccentric part 2 is circular, and the diameter of the outer edge of the eccentric part 2 is D. The first channel section 31 is a circular hole, and the diameter of the first channel section 31 is d, where 1≤D / d≤10.

[0080] In one specific embodiment, D / d = 5.

[0081] In a specific embodiment not shown, the first channel segment 31 has an elliptical cross-section in the thickness direction of the main body 1.

[0082] In a specific embodiment not shown, the first channel segment 31 has a polygonal cross-section in the thickness direction of the main body 1.

[0083] like Figure 2 As shown in this application, the depth of the first channel segment 31 in the thickness direction of the main body 1 is H1, where 3mm≤H1≤15mm.

[0084] In one specific embodiment, H1 = 5 mm.

[0085] like Figure 1 As shown in this application, the second channel segment 32 includes a first channel wall 321 and a second channel wall 322 connected to each other. The first channel wall 321 is located on the side of the second channel wall 322 closer to the rotation axis 5. The first channel wall 321 extends along the outer edge of the rotation axis 5, and the second channel wall 322 extends along the outer edge of the eccentric portion 2. This arrangement makes the channel 3 more compact, and the wall surface of the second channel segment 32 is designed according to the shape of the surrounding structure, which facilitates maximizing weight reduction while ensuring structural strength.

[0086] Specifically, the cross-sectional area of ​​the second channel segment 32 remains unchanged along the thickness direction of the main body 1.

[0087] Specifically, the cross-section of the second channel segment 32 in the thickness direction of the main body 1 is crescent-shaped.

[0088] Specifically, such as Figure 2 As shown, the depth of the second channel segment 32 in the thickness direction of the main body 1 is H2, 3mm≤H2≤10mm.

[0089] In one specific embodiment, H2 = 5 mm.

[0090] like Figure 1 and Figure 3 As shown in this application, in order to better reduce the overall weight of the cam structure, reduce material consumption, and achieve lightweighting of the cam structure, the cam structure also includes a weight reduction hole 6, which is provided on the main body 1 and penetrates the main body 1.

[0091] In this application, each weight-reducing hole 6 is a circular hole, and the maximum diameter of each weight-reducing hole 6 is less than or equal to 20 mm.

[0092] In one specific embodiment, the maximum diameter of each weight-reducing hole 6 is 15 mm.

[0093] In a specific embodiment not shown, the weight reduction hole 6 is an elliptical hole.

[0094] In a specific embodiment not shown, the weight reduction hole 6 is a polygonal hole.

[0095] Specifically, there are at least two weight-reducing holes 6. One of the weight-reducing holes 6 and the other weight-reducing hole 6 are symmetrically arranged along the second preset plane 7. The second preset plane 7 extends along the thickness direction of the main body 1. The center of gravity of the main body 1 is located on the second preset plane 7. The second preset plane 7 and the first preset plane 4 are perpendicular to each other.

[0096] Specifically, there are multiple weight-reducing holes 6, which are arranged at intervals along the periphery of the main body 1 to form a weight-reducing hole group 61; there are at least two weight-reducing hole groups 61, and one weight-reducing hole group 61 and the other weight-reducing hole group 61 are symmetrically arranged along the second preset plane 7.

[0097] Specifically, each weight reduction hole group 61 is symmetrically arranged relative to the first preset plane 4, thereby better ensuring the center of gravity balance and stability of the cam structure during rotation and reducing vibration and noise.

[0098] In one specific embodiment, there are two weight-reducing hole groups 61, and one of the weight-reducing hole groups 61 and the other weight-reducing hole group 61 are symmetrically arranged along the second preset plane 7. Each weight-reducing hole group 61 includes five weight-reducing holes 6. The five weight-reducing holes 6 are arranged sequentially at intervals along the outer edge of the main body 1.

[0099] Specifically, such as Figure 3As shown, the five weight-reducing holes 6 include one first weight-reducing hole 62, two second weight-reducing holes 63, and two third weight-reducing holes 64. The two second weight-reducing holes 63 are located on opposite sides of the first weight-reducing hole 62. One third weight-reducing hole 64 is located on the side of one second weight-reducing hole 63 away from the first weight-reducing hole 62, and the other third weight-reducing hole 64 is located on the side of the other second weight-reducing hole 63 away from the first weight-reducing hole 62. The diameter of the first weight-reducing hole 62 is larger than the diameter of the second weight-reducing hole 63, and the diameter of the second weight-reducing hole 63 is larger than the diameter of the third weight-reducing hole 64.

[0100] This utility model also provides a pruning machine, including: a motor; a cam structure, the cam structure being driven to rotate by the motor; the cam structure includes: a main body 1, rotatably disposed along a preset axis; the main body 1 includes two opposing main body surfaces 11; an eccentric part 2, disposed on at least one of the two main body surfaces 11 and moving synchronously with the main body 1; a channel 3, penetrating the main body 1 and the eccentric part 2 along the thickness direction of the main body 1; and a blade assembly connected to the cam structure, the blade assembly and the rotational movement of the cam structure reciprocating in opposite directions.

[0101] This application includes at least the following embodiments:

[0102] Example 1

[0103] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric part 2 along the thickness direction of the main body 1.

[0104] Example 2

[0105] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that passes through the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. The cam structure also includes a rotating shaft 5. The rotating shaft 5 passes through the main body 1 and the eccentric part 2, extends along the thickness direction of the main body 1, and its central axis coincides with the preset axis Z. The rotating shaft 5 is fixed relative to the main body 1 and the eccentric part 2, and the main body 1, the eccentric part 2, and the rotating shaft 5 rotate integrally.

[0106] Example 3

[0107] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are at least two eccentric parts 2, one of which is attached to one of the two main body surfaces 11, and the other is attached to the other of the two main body surfaces 11. There are at least two channels 3, one of which penetrates the main body 1 and one of the at least two eccentric parts 2, and the other channel 3 penetrates the main body 1 and the other of the at least two eccentric parts 2.

[0108] Example 4

[0109] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are at least two eccentric parts 2, one of which is attached to one of the two main body surfaces 11, and the other is attached to the other of the two main body surfaces 11. There are at least two channels 3, one of which penetrates the main body 1 and one of the at least two eccentric parts 2, and the other channel 3 penetrates the main body 1 and the other of the at least two eccentric parts 2. At least one of the two eccentric portions 2 and the other eccentric portion 2, as well as at least one of the two channels 3 and the other channel 3, are symmetrically arranged relative to the first preset plane 4. The first preset plane 4 extends along the thickness direction of the main body portion 1, and the center of gravity of the main body portion 1 is located on the first preset plane 4.

[0110] Example 5

[0111] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are at least two eccentric parts 2, one of which is attached to one of the two main body surfaces 11, and the other is attached to the other of the two main body surfaces 11. There are at least two channels 3, one of which penetrates the main body 1 and one of the at least two eccentric parts 2, and the other channel 3 penetrates the main body 1 and the other of the at least two eccentric parts 2. At least one of the two eccentric portions 2 and the other eccentric portion 2, as well as at least one of the two channels 3 and the other channel 3, are symmetrically arranged relative to the second preset plane 7. The second preset plane 7 extends along the thickness direction of the main body portion 1, and the center of gravity of the main body portion 1 is located on the second preset plane 7. The second preset plane 7 and the first preset plane 4 are perpendicular to each other.

[0112] Example 6

[0113] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are at least two eccentric parts 2, one of which is attached to one of the two main body surfaces 11, and the other is attached to the other of the two main body surfaces 11. There are at least two channels 3, one of which penetrates the main body 1 and one of the at least two eccentric parts 2, and the other channel 3 penetrates the main body 1 and the other of the at least two eccentric parts 2. At least one of the two eccentric portions 2 and the other eccentric portion 2, as well as at least one of the two channels 3 and the other channel 3, are symmetrically arranged with respect to a first preset plane 4. The first preset plane 4 extends along the thickness direction of the main body 1, and the center of gravity of the main body 1 is located on the first preset plane 4. At least one of the two eccentric portions 2 and the other eccentric portion 2, as well as at least one of the two channels 3 and the other channel 3, are symmetrically arranged with respect to a second preset plane 7. The second preset plane 7 extends along the thickness direction of the main body 1, and the center of gravity of the main body 1 is located on the second preset plane 7. The second preset plane 7 and the first preset plane 4 are perpendicular to each other.

[0114] Example 7

[0115] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are two eccentric parts 2, one of which is attached to one of the two main body surfaces 11, and the other is attached to the other of the two main body surfaces 11. There are two channels 3, one of which penetrates the main body 1 and one of the two eccentric parts 2, and the other channel 3 penetrates the main body 1 and the other of the two eccentric parts 2. The two eccentric parts 2 and the corresponding channels 3 disposed on the two eccentric parts 2 are symmetrical with respect to a first preset plane 4 and a second preset plane 7.

[0116] Example 8

[0117] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main surfaces 11. The eccentric portion 2 is disposed on at least one of the two main surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The eccentric portion 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are two eccentric portions 2, one of which is attached to one of the two main surfaces 11 and the other is attached to the other of the two main surfaces 11. At least a portion of one eccentric portion 2 is disposed opposite to at least a portion of the other eccentric portion 2. There are two channels 3, both of which penetrate the main body 1 and the two eccentric portions 2. The two eccentric portions 2 and the two channels 3 are symmetrical with respect to a first preset plane 4 and a second preset plane 7.

[0118] Example 9

[0119] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are two main body parts 1 and two eccentric parts 2, one eccentric part 2 disposed on one main body surface 11 of one main body 1 and the other eccentric part 2 disposed on one main body surface 11 of another main body 1. The other main body surface 11 of one main body 1 and the other main body surface 11 of the other main body 1 are opposite to each other. There are two channels 3, one channel 3 penetrates one main body 1 and one eccentric part 2, and the other channel 3 penetrates the other main body 1 and the other eccentric part 2. The two eccentric parts 2 and the two channels 3 are symmetrical with respect to the first preset plane 4 and the second preset plane 7.

[0120] Example 10

[0121] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are two main body parts 1 and two eccentric parts 2, one eccentric part 2 disposed on one main body surface 11 of one main body part 1 and the other eccentric part 2 disposed on one main body surface 11 of another main body part 1. The other main body surface 11 of one main body part 1 and the other main body surface 11 of the other main body part 1 are opposite to each other. At least a portion of one eccentric part 2 is opposite to at least a portion of the other eccentric part 2. There are two channels 3, both of which penetrate the two main body parts 1 and the two eccentric parts 2. The two eccentric parts 2 and the two channels 3 are symmetrical with respect to the first preset plane 4 and the second preset plane 7.

[0122] Example 11

[0123] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The eccentric part 2 is fixedly disposed on the main body 1 and rotates integrally with the rotation of the main body 1. There are multiple channels 3, which are spaced apart to form a channel group. There are at least two eccentric parts 2, one and the other of which are respectively disposed on the two main body surfaces 11. There are at least two channel groups, one and the other of which are symmetrically disposed with respect to a first preset plane 4 and a second preset plane 7. One of the channel groups penetrates the main body 1 and one of the at least two eccentric parts 2, and the other channel group penetrates the main body 1 and the other of the at least two eccentric parts 2.

[0124] Example 12

[0125] The difference between Embodiment 12 and Embodiment 11 is that there are two channel groups, each channel group including multiple channels 3 arranged at intervals. There are two eccentric parts 2, one and the other are respectively arranged on two main body surfaces 11. One channel group penetrates the main body 1 and one of the two eccentric parts 2, and the other channel group penetrates the main body 1 and the other eccentric part 2. One channel group and the other channel group are symmetrically arranged with respect to the first preset plane 4 and the second preset plane 7.

[0126] Example 13

[0127] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2.

[0128] Example 14

[0129] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2. Along the thickness direction of the main body 1, the cross-sectional area of ​​the first channel segment 31 is smaller than the cross-sectional area of ​​the second channel segment 32.

[0130] Example 15

[0131] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2. Along the thickness direction of the main body 1, the cross-section of the first channel segment 31 is the same as the cross-section of the second channel segment 32.

[0132] Example 16

[0133] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2. The cross-section of the first channel segment 31 along the thickness direction of the main body 1 is centrally symmetrical.

[0134] Example 17

[0135] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2. The second channel segment 32 includes a first channel wall 321 and a second channel wall 322 connected to each other. The first channel wall 321 is located on the side of the second channel wall 322 closer to the rotation axis 5. The first channel wall 321 extends along the outer edge direction of the rotation axis 5, and the second channel wall 322 extends along the outer edge direction of the eccentric portion 2.

[0136] Example 18

[0137] The cam structure includes a main body 1 and an eccentric portion 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric portion 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that extends through the main body 1 and the eccentric portion 2 along the thickness direction of the main body 1. The channel 3 includes a first channel segment 31 located on the main body 1 and a second channel segment 32 located on the eccentric portion 2. The cross-section of the first channel segment 31 along the thickness direction of the main body 1 is centrally symmetrical. The second channel segment 32 includes a first channel wall 321 and a second channel wall 322 connected to each other. The first channel wall 321 is located on the side of the second channel wall 322 closer to the rotation axis 5. The first channel wall 321 extends along the outer edge direction of the rotation axis 5, and the second channel wall 322 extends along the outer edge direction of the eccentric portion 2.

[0138] Example 19

[0139] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also includes a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The cam structure also includes a weight-reducing hole 6, which is disposed on the main body 1 and penetrates the main body 1.

[0140] Example 20

[0141] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also has a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The cam structure also includes a weight-reducing hole 6, which is disposed on the main body 1 and penetrates the main body 1. There are at least two weight-reducing holes 6, and one of the at least two weight-reducing holes 6 and the other weight-reducing hole 6 are symmetrically arranged along a second preset plane 7.

[0142] Example 21

[0143] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also includes a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The cam structure also includes a weight-reducing hole 6, which is disposed on the main body 1 and penetrates the main body 1. There are at least two weight-reducing holes 6, and one of the at least two weight-reducing holes 6 and the other weight-reducing hole 6 are symmetrically arranged along a first preset plane 4.

[0144] Example 22

[0145] The cam structure includes a main body 1 and an eccentric part 2 disposed on the main body 1. The main body 1 has a preset axis and is rotatably disposed along the preset axis. The main body 1 includes two opposing main body surfaces 11. The eccentric part 2 is disposed on at least one of the two main body surfaces 11 and moves synchronously with the main body 1. The cam structure also includes a channel 3 that penetrates the main body 1 and the eccentric part 2 along the thickness direction of the main body 1. The cam structure also includes a weight-reducing hole 6, which is disposed on the main body 1 and penetrates the main body 1. There are at least two weight-reducing holes 6, and one of the at least two weight-reducing holes 6 and the other weight-reducing hole 6 are symmetrically disposed along a first preset plane 4 and a second preset plane 7.

[0146] This invention offers the following advantages: By providing channels 3 that penetrate the main body 1 and the eccentric part 2 along the thickness direction of the main body 1, a direct and efficient lubrication pathway is achieved for the cam structure. Lubricating oil can circulate through these channels on the upper and lower surfaces of the eccentric part 2, ensuring adequate lubrication of critical components, reducing friction and wear, and extending the service life of the components. Furthermore, the design of channels 3 not only optimizes the lubrication effect of the structure but also facilitates weight reduction, material consumption reduction, and cost reduction, achieving tool lightweighting.

[0147] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0148] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cam structure, characterized in that, The cam structure includes: The main body (1) is rotatably disposed along a preset axis; the main body (1) includes two opposing main body surfaces (11). An eccentric part (2) is provided on at least one of the two main body surfaces (11) and moves synchronously with the main body part (1); The channel (3) penetrates the main body (1) and the eccentric part (2) along the thickness direction of the main body (1).

2. The cam structure according to claim 1, characterized by At least one eccentric portion (2) is provided on each of the main body surfaces (11); The channel (3) is at least two, one of the at least two channels (3) passes through the main body (1) and one of the at least two eccentric parts (2), and the other channel (3) passes through the main body (1) and the other of the at least two eccentric parts (2).

3. The cam structure according to claim 2, characterized in that, At least one of the two eccentric portions (2) and the other eccentric portion (2) are symmetrically arranged with respect to a first preset plane (4), the first preset plane (4) extends along the thickness direction of the main body (1), and the center of gravity of the main body (1) is located on the first preset plane (4); At least one of the two channels (3) and the other channel (3) are symmetrically arranged with respect to the first preset plane (4).

4. The cam structure according to claim 1, characterized in that, The channel (3) includes a first channel segment (31) located on the main body (1) and a second channel segment (32) located on the eccentric part (2); wherein: Along the thickness direction of the main body (1), the cross-sectional area of ​​the first channel segment (31) is smaller than the cross-sectional area of ​​the second channel segment (32); or, Along the thickness direction of the main body (1), the cross-section of the first channel segment (31) is the same as the cross-section of the second channel segment (32).

5. The cam structure according to claim 4, characterized in that, The cam structure also includes a rotating shaft (5); the rotating shaft (5) passes through the main body (1) and the eccentric part (2); wherein, the second channel segment (32) includes a first channel wall (321) and a second channel wall (322) connected to each other, the first channel wall (321) is located on the side of the second channel wall (322) close to the rotating shaft (5), the first channel wall (321) extends along the outer edge direction of the rotating shaft (5), and the second channel wall (322) extends along the outer edge direction of the eccentric part (2).

6. The cam structure according to claim 4, characterized in that, The first channel segment (31) is a circular hole, and the diameter of the first channel segment (31) is d, 3mm≤d≤30mm; and / or, The depth of the first channel segment (31) in the thickness direction of the main body (1) is H1, 3mm≤H1≤15mm; The outer edge of the eccentric portion (2) is circular, and the diameter of the outer edge of the eccentric portion (2) is D; the first channel segment (31) is a circular hole, and the diameter of the first channel segment (31) is d, 1≤D / d≤10; and / or, The second channel segment (32) has a depth of H2 in the thickness direction of the main body (1), where 3mm≤H2≤10mm.

7. The cam structure according to claim 1, characterized in that, There are multiple channels (3), and the multiple channels (3) are arranged at intervals with each other; The eccentric portion (2) is at least two, and one and the other of the at least two eccentric portions (2) are respectively disposed on the two main body surfaces (11); the multiple channels (3) form a channel group; the channel group is at least two, and one of the channel groups and the other channel group are symmetrically disposed relative to the first preset plane (4), one of the channel groups penetrates the main body portion (1) and one of the eccentric portions (2) of the at least two eccentric portions (2), and the other channel group penetrates the main body portion (1) and the other eccentric portion (2) of the at least two eccentric portions (2).

8. The cam structure according to claim 3, characterized in that, The cam structure also includes: Weight reduction hole (6) is provided on the main body (1) and penetrates the main body (1). There are at least two weight reduction holes (6). One of the weight reduction holes (6) and the other weight reduction hole (6) are symmetrically arranged along a second preset plane (7). The second preset plane (7) extends along the thickness direction of the main body (1). The center of gravity of the main body (1) is located on the second preset plane (7). The second preset plane (7) and the first preset plane (4) are perpendicular to each other.

9. The cam structure according to claim 8, characterized in that, There are multiple weight-reducing holes (6), which are arranged at intervals along the periphery of the main body (1) to form weight-reducing hole groups (61); there are at least two weight-reducing hole groups (61), and one of the weight-reducing hole groups (61) and the other weight-reducing hole group (61) are symmetrically arranged along the second preset plane (7); and / or, Each of the weight-reducing holes (6) is a circular hole, and the maximum diameter of each of the weight-reducing holes (6) is less than or equal to 20 mm.

10. A pruning machine, characterized in that, include: Electric motor; A cam structure, the cam structure being driven to rotate by the motor; The cam structure includes: a main body (1) rotatably disposed along a preset axis; the main body (1) includes two opposing main body surfaces (11); an eccentric part (2) disposed on at least one of the two main body surfaces (11) and moving synchronously with the main body (1); and a channel (3) penetrating the main body (1) and the eccentric part (2) along the thickness direction of the main body (1). A blade assembly connected to the cam structure, the blade assembly reciprocating in opposite directions to the rotational motion of the cam structure.

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